Prosecution Insights
Last updated: July 17, 2026
Application No. 18/544,447

SYSTEM, TERMINAL DEVICE, AND METHOD FOR FORMING A COMMUNICATION LINK

Final Rejection §103
Filed
Dec 19, 2023
Priority
Jan 17, 2023 — CN 202310076320.4
Examiner
SOE, KYAW Z
Art Unit
2412
Tech Center
2400 — Computer Networks
Assignee
Optoma Corporation
OA Round
2 (Final)
90%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 90% — above average
90%
Career Allowance Rate
320 granted / 357 resolved
+31.6% vs TC avg
Moderate +10% lift
Without
With
+9.7%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
28 currently pending
Career history
393
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
78.2%
+38.2% vs TC avg
§102
6.3%
-33.7% vs TC avg
§112
4.3%
-35.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 357 resolved cases

Office Action

§103
Detail Action This office action is a response to an amendment submitted on 04/02/2026. Claims 1- 209 are pending for examination. Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Drawings The drawings were received on 12/19/2023. These drawings are acceptable for examination proceedings. Response to Amendment Claims 1, 9, 15 and 19 have been amended. Response to Arguments The objection to title has been withdrawn in view of applicant’s amended title. Applicant's arguments filed on 04/02/2026 have been fully considered but they are not persuasive. Applicant’s arguments are summarized a following; Applicant argued that Prior Arts Zhu in view of Chu “does not teach or suggest that an electro-magnetic signal can be broadcast periodically… “ In response to applicant’s argument, the examiner respectfully disagrees with the current above arguments. In response to applicant's argument, a recitation of the intended use of the claimed invention must result in a structural difference between the claimed invention and the prior art in order to patentably distinguish the claimed invention from the prior art. If the prior art structure is capable of performing the intended use, then it meets the claim. In this case, Applicant’s arguments focus on whether the Prior Arts disclosed the exact claim language in isolation, rather than whether the claimed subject matter as a whole would have been obvious to one of the ordinary skill in the art. The rejection properly relies on the combined Prior Arts Zhu and Chu, where both teach periodic transmission and D2D authentication features. Applicant argued that Zhu does not expressly teach a Bluetooth transceiver broadcasting an electro-magnetic signal periodically. However, one in the ordinary skill in the art understood that BLUETOOTH technology already transmit electromagnetic signals periodically as part of its ordinary operation. Therefore, the added recitation of “broadcast an electro-magnetic signal periodically” does not distinguish the claim. Bluetooth is a wireless technology that uses radio frequency waves, which are electromagnetic waves, to transmit information between devices. Accordingly, because the recited Bluetooth-based system of Zhu already disclosed the same feature/structure that is capable of performing the intended use of the claimed limitation of “broadcasting an electro-magnetic signal…. “, it renders the claim obvious. Therefore, applicant’s arguments are not persuasive. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103(a) are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or non-obviousness. Claims 1- 20 are rejected under 35 U.S.C. 103 as being unpatentable over Zhu et al. (US 20190349758 A1), hereinafter “Zhu”; and in further view of Chu et al. (US 9730255 B1), hereinafter “Chu”. Regarding claim 1, Zhu teaches A terminal device, comprising [Zhu: Fig. 5; user device500]: a speaker, configured to broadcast an audio signal, wherein the audio signal comprises an identifier of the terminal device [Zhu: Par. 27; Fig. 3;6 teaches host STA periodically broadcast ultrasound signal which include SSID]; a Bluetooth communication transceiver, configured to broadcast an electro-magnetic signal periodically, wherein the electro-magnetic signal comprises an encoded message [Zhu: Figs 3, 6; Par. 27 and 85 teaches of receiving/transmitting of ultrasound signal with authentication request/response to determine/generate key using Bluetooth which broadcast an electromagnetic signal in periodically manner]. PNG media_image1.png 618 472 media_image1.png Greyscale However, Zhu does not teach a processing apparatus electrically coupled to the Bluetooth communication transceiver and the speaker, wherein the processing apparatus is configured to encode a first message, according to the identifier, to generate the encoded message. Nevertheless, Chu, in the similar filed of endeavor, teaches a processing apparatus electrically coupled to the Bluetooth communication transceiver and the speaker, wherein the processing apparatus is configured to encode a first message, according to the identifier, to generate the encoded message [Chu: Col. 10; Lines 55- 65 teaches Bluetooth in the electronic device decode the Unique ID through audio interface for establish connection]. PNG media_image2.png 512 438 media_image2.png Greyscale Thus it would have been obvious to one of ordinary skill at the time the invention was made to utilize the teachings of Chu for pairing devices using ultrasonic signal. One of ordinary skill in the art would be motivated to utilize the teachings of Chu in the Zhu system in order to pair and identified the matching devices in the proximity [Chu: Abstract]. Regarding claim 2, the combined Zhu in view of Chu teaches all the limitations in the parent claim 1. Zhu in view of Chu further teaches wherein the first message comprises connection configuration information of the terminal device [Zhu: Fig. 3 illustrates communicating configuration information]. Regarding claim 3, the combined Zhu in view of Chu teaches all the limitations in the parent claim 2. Zhu in view of Chu further teaches receive a connecting request corresponding to the connection configuration information through the Bluetooth communication transceiver and establish a connection according to the connecting request [Zhu: Fig. 3]. Regarding claim 4, the combined Zhu in view of Chu teaches all the limitations in the parent claim 1. Zhu in view of Chu further teaches wherein the audio signal comprises an ultrasonic signal supported by data over sound technology, wherein a frequency of the ultrasonic signal is greater than 20,000 Hz [Chu: Col 8-9 teaches of using 20 kHz ultrasonic signal for communication]. Regarding claim 5, the combined Zhu in view of Chu teaches all the limitations in the parent claim 1. Zhu in view of Chu further teaches wherein the electro-magnetic signal comprises an electro-magnetic wave signal supported by Bluetooth communication technology [Zhu: Par. 27 & 85 teaches of using ultrasound signal communication with Bluetooth technology]. Regarding claim 6, the combined Zhu in view of Chu teaches all the limitations in the parent claim 1. Zhu in view of Chu further teaches wherein the identifier comprises one of the following: a serial number and a media access control (MAC) address [Zhu: par. 70 disclosed operate MAC communication]. Regarding claim 7, the combined Zhu in view of Chu teaches all the limitations in the parent claim 1. Zhu in view of Chu further teaches wherein the speaker is configured to broadcast the audio signal periodically, [Zhu: Fig. 3]. Regarding claim 8, the combined Zhu in view of Chu teaches all the limitations in the parent claim 3. Zhu in view of Chu further teaches wherein when the terminal device is in a standby state, the processing apparatus is configured to execute the specific application [Zhu: Par. 35 teaches of devices have device state status]. Regarding claim 9, Zhu teaches A terminal device, comprising [Zhu: Fig. 5; user device500]: an audio receiver, configured to receive a first audio signal, wherein the first audio signal comprises a first identifier [Zhu: Par. 27; Fig. 3;6 teaches host STA periodically broadcast ultrasound signal which include SSID]; a Bluetooth communication transceiver, configured to receive an electro-magnetic signal that is broadcasted periodically, wherein the electro-magnetic signal comprises an encoded message [[Zhu: Figs 3, 6; Par. 27 and 85 teaches of receiving/transmitting of ultrasound signal with authentication request/response to determine/generate key using Bluetooth which broadcast an electromagnetic signal in periodically manner] PNG media_image1.png 618 472 media_image1.png Greyscale However, Zhu does not teach a processing apparatus electrically coupled to the Bluetooth communication transceiver and the audio receiver, wherein the processing apparatus is configured to decode the encoded message according to the first identifier to obtain a first message. Nevertheless, Chu, in the similar filed of endeavor, teaches a processing apparatus electrically coupled to the Bluetooth communication transceiver and the audio receiver, wherein the processing apparatus is configured to decode the encoded message according to the first identifier to obtain a first message [Chu: Col. 10; Lines 55- 65 teaches Bluetooth in the electronic device decode the Unique ID through audio interface for establish connection]. PNG media_image2.png 512 438 media_image2.png Greyscale Thus it would have been obvious to one of ordinary skill at the time the invention was made to utilize the teachings of Chu for pairing devices using ultrasonic signal. One of ordinary skill in the art would be motivated to utilize the teachings of Chu in the Zhu system in order to pair and identified the matching devices in the proximity [Chu: Abstract]. Regarding claim 10, the combined Zhu in view of Chu teaches all the limitations in the parent claim 9. Zhu in view of Chu further teaches wherein the terminal device is configured to receive the first audio signal comprising the first identifier at a first time point and a second audio signal comprising a second identifier at a second time point, wherein in response to the first time point being later than the second time point [Zhu: Par. 82 disclosed using SSID(s) for authentication data], the processing apparatus is configured to execute a specific application to select the first identifier from the first identifier and the second identifier to decode the encoded message according to the first identifier [Zhu: Fig.4; Par. 82-86 teaches determining signal based on SSID associated with wireless device/network and establish connection based on the authentication process]. Regarding claim 11, the combined Zhu in view of Chu teaches all the limitations in the parent claim 10. Zhu in view of Chu further teaches wherein the first message comprises connection configuration information, and wherein in response to obtaining the connection configuration information, the processing apparatus is configured to execute the specific application to transmit a connecting request corresponding to the connection configuration information, through the Bluetooth communication transceiver, to establish a connection [Zhu: Figs. 3-4; Par. 27; Par. 82-89] Regarding claim 12, the claim is interpreted and rejected for the same reason as set forth for claim 4. Regarding claim 13, the claim is interpreted and rejected for the same reason as set forth for claim 5. Regarding claim 14, the claim is interpreted and rejected for the same reason as set forth for claim 6. Regarding claim 15, Zhu teaches A system for forming a communication link, comprising: a first terminal device and a second terminal device, the first terminal device, comprising[Zhu: Fig. 5; user device500]: a speaker, configured to broadcast a first audio signal, wherein the first audio signal comprises a first identifier of the first terminal device [Zhu: Par. 27; Fig. 3;6 teaches host STA periodically broadcast ultrasound signal which include SSID]; a first Bluetooth communication transceiver, configured to broadcast an electro-magnetic signal periodically, wherein the electro-magnetic signal comprises an encoded message [[Zhu: Figs 3, 6; Par. 27 and 85 teaches of receiving/transmitting of ultrasound signal with authentication request/response to determine/generate key using Bluetooth which broadcast an electromagnetic signal in periodically manner]. PNG media_image1.png 618 472 media_image1.png Greyscale the second terminal device, comprising: an audio receiver, configured to receive the first audio signal from the first terminal device [Zhu: Fig. 3]; a second Bluetooth communication transceiver, configured to receive the electro-magnetic signal that is broadcasted periodically from the first terminal device [Fig. 3] However, Zhu does not teach a first processing apparatus electrically coupled to the first Bluetooth communication transceiver and the speaker, wherein the first processing apparatus is configured to encode a first message according to the first identifier to generate the encoded message; a second processing apparatus electrically coupled to the second Bluetooth communication transceiver and the audio receiver, wherein the second processing apparatus is configured to decode the encoded message according to the first identifier to obtain the first message. Nevertheless, Chu, in the similar filed of endeavor, teaches the first Bluetooth communication transceiver and the speaker, wherein the first processing apparatus is configured to encode a first message according to the first identifier to generate the encoded message [Chu: Fig. 8] ; a second processing apparatus electrically coupled to the second Bluetooth communication transceiver and the audio receiver, wherein the second processing apparatus is configured to decode the encoded message according to the first identifier to obtain the first message [Chu: Col. 10; Lines 55- 65 teaches Bluetooth in the electronic device decode the Unique ID through audio interface for establish connection]. PNG media_image2.png 512 438 media_image2.png Greyscale Thus it would have been obvious to one of ordinary skill at the time the invention was made to utilize the teachings of Chu for pairing devices using ultrasonic signal. One of ordinary skill in the art would be motivated to utilize the teachings of Chu in the Zhu system in order to pair and identified the matching devices in the proximity [Chu: Abstract]. Regarding claim 16, the combined Zhu in view of Chu teaches all the limitations in the parent claim 15. Zhu in view of Chu further teaches the first message comprises connection configuration information, wherein the second terminal device is configured to obtain the connection configuration information [Zhu: Par. 27 teaches UE transmitting connection configuration information to electronic device in the network] and transmit a connecting request corresponding to the connection configuration information to the first terminal device, through the second Bluetooth communication transceiver, to establish a connection with the first terminal device [Zhu: Fig. 4; Par. 80- 85 further teaches requesting and authenticating device using Bluetooth communication with ultrasound signal]. Regarding claim 17, the claim is interpreted and rejected for the same reason as set forth for claim 10. Regarding claim 18, the claim is interpreted and rejected for the same reason as set forth for claim 7. Regarding claim 19, Zhu teaches A method for forming a communication link, comprising [Zhu: Fig. 5; user device500]: broadcasting an audio signal by a speaker of a first terminal device, wherein the audio signal comprises an identifier of the first terminal device [Zhu: Par. 27; Fig. 3;6 teaches host STA periodically broadcast ultrasound signal which include SSID]; broadcasting an electro-magnetic signal periodically by a first Bluetooth communication transceiver of the first terminal device, wherein the electro-magnetic signal comprises an encoded message [[Zhu: Figs 3, 6; Par. 27 and 85 teaches of receiving/transmitting of ultrasound signal with authentication request/response to determine/generate key using Bluetooth which broadcast an electromagnetic signal in periodically manner]; PNG media_image1.png 618 472 media_image1.png Greyscale However, Zhu does not teach encoding a first message according to the identifier to generate the encoded message by a first processing apparatus of the first terminal device. Nevertheless, Chu, in the similar filed of endeavor, teaches encoding a first message according to the identifier to generate the encoded message by a first processing apparatus of the first terminal device [Chu: Fig. 8; Col. 10; Lines 55- 65 teaches Bluetooth in the electronic device decode the Unique ID through audio interface for establish connection]. PNG media_image2.png 512 438 media_image2.png Greyscale Thus it would have been obvious to one of ordinary skill at the time the invention was made to utilize the teachings of Chu for pairing devices using ultrasonic signal. One of ordinary skill in the art would be motivated to utilize the teachings of Chu in the Zhu system in order to pair and identified the matching devices in the proximity [Chu: Abstract]. Regarding claim 20, the combined Zhu in view of Chu teaches all the limitations in the parent claim 19. Zhu in view of Chu further teaches receiving the audio signal by an audio receiver of a second terminal device; receiving an electro-magnetic signal by a second Bluetooth communication transceiver of the second terminal device [Zhu: Fig. 4; Par. 27 teaches of using Bluetooth technology with ultrasound signal to communicate with electronic devices]; decoding the encoded message according to the identifier to obtain the first message by a second processing apparatus of the second terminal device [Chu: Fig. 8; Col. 10; Lines 55- 65 teaches Bluetooth in the electronic device decode the Unique ID through audio interface for establish connection], wherein the first message comprises connection configuration information [Zhu: Fig. 4]; transmitting, by the second device terminal, a connecting request corresponding to the connection configuration information to the first terminal device to establish a connection with the first terminal device [Zhu: Fig. 3; step 306 request connection using authorization information request sending to terminal device]; and disconnecting the connection between the second terminal device and the first terminal device when the second terminal device does not receive one of the audio signals and the electro-magnetic signal during a predetermined time period [Zhu: Fig. 3; further illustrate determining the connection whether secure key are authenticated]. Conclusion The prior art made of record (see attached PTO-892) and not relied upon is considered pertinent to applicant's disclosure. THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KYAW Z SOE whose telephone number is (571)270-0304. The examiner can normally be reached 9am-5pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Charles C Jiang can be reached at 5712707191. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /KYAW Z SOE/Primary Examiner, Art Unit 2412
Read full office action

Prosecution Timeline

Dec 19, 2023
Application Filed
Dec 10, 2025
Non-Final Rejection mailed — §103
Apr 02, 2026
Response Filed
Jun 24, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12684568
TERMINAL, BASE STATION AND METHOD
2y 11m to grant Granted Jul 14, 2026
Patent 12671481
METHOD OF UPLINK TRANSMISSION
2y 6m to grant Granted Jun 30, 2026
Patent 12670749
Method And System For Utilizing Vehicle Odometer Values and Dynamic Compliance
2y 2m to grant Granted Jun 30, 2026
Patent 12665715
FEDERATED LEARNING SYSTEM AND METHOD WITH ADAPTIVE NOISE AND DIFFERENTIAL PRIVACY
2y 6m to grant Granted Jun 23, 2026
Patent 12652622
ADAPTIVE LOW-POWER CONSUMPTION METHOD, DEVICE, AND MEDIUM ACCESS CONTROL (MAC) LAYER FOR WIRELESS SENSOR NETWORKS
2y 5m to grant Granted Jun 09, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
90%
Grant Probability
99%
With Interview (+9.7%)
2y 1m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 357 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month