Prosecution Insights
Last updated: October 27, 2026

Fang-Chi Chang, USPTO Patent Examiner

Listed by the USPTO as CHANG, FANG-CHI

Tech Center 2800 • Art Units: 2852 2862

This examiner grants 70% of resolved cases

Performance Statistics

70.5%
Allow Rate
+2.5% vs TC avg
480
Total Applications
-29.8%
Interview Lift
923
Avg Prosecution Days
Based on 465 resolved cases, 2023–2026

Rejection Statute Breakdown

1.1%
§101 Eligibility
33.9%
§102 Novelty
57.0%
§103 Obviousness
5.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19014607 OPTICAL APPARATUS, ACCESSORY, ACCESSORY ATTACHMENT METHOD, AND ACCESSORY DETACHMENT METHOD Non-Final OA CANON KABUSHIKI KAISHA
18742868 IMAGING DEVICE Non-Final OA Panasonic Automotive Systems Co., Ltd.
18917983 REFLECTIVE MODULE AND CAMERA MODULE INCLUDING THE SAME Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18392712 POSTURE ADJUSTMENT DEVICE Non-Final OA Hanwha Vision Co., Ltd.
18741280 IMAGE CAPTURE SYSTEMS INCLUDING REMOVABLE ACCESSORIES WITH HAPTIC COMPONENT(S) Non-Final OA GoPro, Inc.
18883926 MOUNTING DEVICE FOR A CAMERA Non-Final OA iPEK International GmbH

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Fang-Chi Chang's allowance rate?

70.5% of resolved applications examined by Fang-Chi Chang were allowed (465 resolved cases), compared with 78.8% across Art Unit 2852 over the last five years.

Does an interview help with examiner Fang-Chi Chang?

This examiner's interview lift is -29.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Fang-Chi Chang take to allow a patent?

Applications allowed by Fang-Chi Chang took 923 days on average from filing to allowance.

Which art unit does examiner Fang-Chi Chang work in?

Fang-Chi Chang examines applications in Art Unit 2852 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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