Prosecution Insights
Last updated: April 19, 2026
Application No. 18/216,207

WALKING ASSISTANCE DEVICE

Non-Final OA §103§DP
Filed
Jun 29, 2023
Examiner
TOICH, SARA KATHERINE
Art Unit
3785
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Toyota Jidosha Kabushiki Kaisha
OA Round
1 (Non-Final)
46%
Grant Probability
Moderate
1-2
OA Rounds
3y 8m
To Grant
95%
With Interview

Examiner Intelligence

Grants 46% of resolved cases
46%
Career Allow Rate
35 granted / 77 resolved
-24.5% vs TC avg
Strong +49% interview lift
Without
With
+49.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
47 currently pending
Career history
124
Total Applications
across all art units

Statute-Specific Performance

§101
2.6%
-37.4% vs TC avg
§103
42.8%
+2.8% vs TC avg
§102
21.1%
-18.9% vs TC avg
§112
26.0%
-14.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 77 resolved cases

Office Action

§103 §DP
DETAILED ACTION 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 . Information Disclosure Statement The information disclosure statements (IDS) dated 06/29/2023 and 12/30/2025 have been received and considered. Claim Objections Claims 1-6 are objected to because of the following informalities. In order to avoid improperly claiming portions of the human body, and to avoid claiming method steps within an apparatus claim, the following claims should be amended: Claim 1: A walking assistance device comprising: a waist attachment portion configured to attach[[ed]] to a waist; a knee attachment portion configured to attach[[ed]] to a knee; and a stretchable wire that connects the waist attachment portion and the knee attachment portion and is configured to configured to assist[[s]] a motion of swinging the thigh forward by an elastic restoring force of the wire, wherein the waist attachment portion includes a wire guide configured to extendconfigured to be guided by the wire guide and extends along the wire guide, and is selectively anchored to at least two or more anchoring portions separated from each other in a longitudinal direction of the wire guide. Claim 2: The walking assistance device according to claim 1, wherein the at least two or more anchoring portions are configured to be arranged on a front surface side of the waist. Claim 3: The walking assistance device according to claim 2, wherein the wire guide includes a guide back surface portion arranged on a back surface side of the waist attachment portion, and wherein the wire extends through the guide back surface portion to reach the at least two or more anchoring portions. 6. The walking assistance device according to claim 1, wherein the wire guide includes a guide back surface portion arranged on a back surface side of the waist attachment portion, and a pair of guide front surface portions are configured to be arranged on a front surface side of the waist and adjacent to each other along the longitudinal direction of the waist attachment portion, and wherein the guide front surface portions are configured to be swingably attached to the guide back surface portion, and wherein the guide front surface portions are detachable from each other. Claims 4 and 5 are objected to as depending upon an objected-to base claim. Appropriate correction is required. 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 for establishing a background for determining obviousness under 35 U.S.C. 103 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 nonobviousness. Claims 1-4 are rejected under 35 U.S.C. 103 as being unpatentable over Chen (CN 114795834 A), hereafter Chen, in view of Shimada et al. (US 2018/0280178 A1), hereafter Shimada. A machine translation of Chen is relied upon to address claims. Regarding Claim 1, Chen discloses a walking assistance device (fig. 2, “Technical Field” page 1) comprising: a waist attachment portion attached to a waist (fig. 2, waist strap 101, page 4 “The power assist” para.); a knee attachment portion attached to a knee (fig. 2, first strap 102, page 4 “The power assist” para.); and a stretchable wire that connects the waist attachment portion and the knee attachment portion and that extends along a front surface of a thigh (fig.2, Bowden lines 2013, page 4 “The active power line” para.), wherein the walking assistance device assists a motion of swinging the thigh forward by an elastic restoring force of the wire (page 4, “The power assist unit” para.), and wherein the wire extends from the knee attachment portion toward the waist attachment portion (this configuration is shown in fig. 2), and is selectively anchored to at least two or more anchoring portions separated from each other in a longitudinal direction (fig. 4, 307 and fig. 2, 305, page 5 “The initial end of the third Bowden” para.). Chen does not explicitly disclose wherein the waist attachment portion includes a wire guide extending along an outer periphery of the waist (see annotated fig. 1, the wire is arranged around the waist, but not by a specific structure) or whether the wire is guided by the wire guide and extends along the wire guide. Shimada teaches the use of a wire guide extending along an outer periphery of a waist portion of a walking assistance device (fig. 1, outer tube 32 enclosing wire 31 [0114]). The wire is guided by the wire guide and extends along the wire guide (fig. 1 [0115]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include a wire guide on Chen’s waist attachment portion extending along an outer periphery of the waist to guide the wire, as taught by Shimada, in order to provide a means of fixing the wire around the waist to the waist attachment portion (Shimada [0115]). Regarding Claim 2, Chen discloses a walking assistance device according to claim 1, wherein the at least two or more anchoring portions are arranged on a front surface side of the waist (fig. 4, 307 and fig. 2, 305 are shown on the front surface of the waist in fig. 2). Regarding Claim 3, Chen as modified discloses a walking assistance device according to claim 2, wherein the wire guide includes a guide back surface portion arranged on a back surface side of the waist (as modified by Shimada fig. 1, 32 extends around the back of the waist), and wherein the wire extends through the guide back surface portion to reach the at least two or more anchoring portions (Shimada [0116] the wire is inserted through the length of the tube 32). Regarding Claim 4, Chen discloses a walking assistance device according to claim 1, wherein an anchor thicker than the wire is attached to the wire (fig. 2, fixing member 305 and 307 (labeled in fig. 4) are shown as thicker than the wires 2013, page 5 “The initial end of the third Bowden” para.), and wherein the wire is anchored to one of the at least two or more anchoring portions via the anchor (fig. 2, two anchoring portions are shown). Claim 5 is rejected under 35 U.S.C. 103 as unpatentable over Chen and Shimada, further in view of Xu et al. (CN 111249119 A), hereafter Xu. A machine translation is relied upon to address claims. Regarding Claim 5, Chen discloses a walking assistance device according to claim 4, but is silent on a groove in the wire guide. Xu teaches the use of a wiring groove in a walking assistance device (page 8, “In an embodiment” para.) to insert wires to protect lines from being hooked by foreign objects during walking. It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to include a groove in the modified Chen’s wire guide in order to protect the wire on the belt from being hooked by foreign objects, or even the user, as taught by Xu. It further would have been obvious to include the anchor accommodated in the groove when the anchor is anchored to one of the at least two or more anchoring portions, since the anchors are designed to maintain the position of the wire (Chen page 5, “The initial end of the third Bowden” para.). Claim 6 is rejected under 35 U.S.C. 103 as unpatentable over Chen and Shimada, further in view of Sankai (WO 2010/035706 A1), hereafter Sankai. A machine translation is relied upon to address claims. Regarding Claim 6, Chen discloses a walking assistance device according to claim 1, wherein the wire guide includes a guide back surface portion arranged on a back surface side of the waist (as modified by Shimada fig. 1, 32 extends around the back of the waist), and a pair of guide front surface portions arranged on a front surface side of the waist and adjacent to each other along the longitudinal direction of the waist attachment portion (as seen in Chen fig. 2, the wire is guided along two front portions of the waist strap 101), but the modified device is silent on wherein the guide front surface portions are swingably attached to the guide back surface portion, and wherein the guide front surface portions are detachable from each other. Sankai discloses a walking assistance device (fig. 3, page 2, first full para.) which has a waist attachment portion (fig. 2, hip fastening member 30, page 3 “Battery 32” para.) and also has a pair of guide front surface portions (fig. 3, 120, 130, page 5 “The waist fastening” para.) that are swingably attached to a guide back surface portion (fig. 3, fitting portion 31, page 5 “The waist fastening” para.), and wherein the guide front surface portions are detachable from each other (fig. 3, locking metal fitting 142 “The waist fastening” para.). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify Chen’s guide front surface portions to include the configuration taught by Sankai in order to provide an adjustable fit in close contact around the waist of the user (Sankai page 5, last para.) Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Co-pending application 18/216303 has been reviewed for potential double patenting. No conflicting claims have been identified at this time. Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARA K. TOICH whose telephone number is (703)756-1450. The examiner can normally be reached M-Th 7:30 am - 4:30 pm, every other F 7:30-3:30 ET. 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, Brandy S. Lee can be reached at (571) 270-7410. 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. /SARA K TOICH/ Examiner, Art Unit 3785 /BRANDY S LEE/ Supervisory Patent Examiner, Art Unit 3785
Read full office action

Prosecution Timeline

Jun 29, 2023
Application Filed
Feb 09, 2026
Non-Final Rejection — §103, §DP
Mar 31, 2026
Interview Requested

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12588721
FACE MASK
2y 5m to grant Granted Mar 31, 2026
Patent 12582178
MASK APPARATUS
2y 5m to grant Granted Mar 24, 2026
Patent 12576290
RESPIRATORY PUMP ARRANGEMENT FOR PERSONAL RESPIRATORY ISOLATION AND METHOD OF USE
2y 5m to grant Granted Mar 17, 2026
Patent 12564531
SOFT EXOSKELETON WEARABLE DEVICE FOR TEMPOROMANDIBULAR DISORDER (TMD) REHABILITATION
2y 5m to grant Granted Mar 03, 2026
Patent 12558286
KNEE JOINT MECHANISM
2y 5m to grant Granted Feb 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
46%
Grant Probability
95%
With Interview (+49.4%)
3y 8m
Median Time to Grant
Low
PTA Risk
Based on 77 resolved cases by this examiner. Grant probability derived from career allow 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