Prosecution Insights
Last updated: October 26, 2026

Edward Chang, USPTO Patent Examiner

Listed by the USPTO as CHANG, EDWARD

Tech Center 3600 • Art Units: 3691 3692 3694 3695 3696

This examiner grants 63% of resolved cases

Analysis

CHANG, EDWARD has 548 resolved cases, with a 63.3% allowance rate and a median of 1218 days to allowance. The profile is assigned to Tech Center 3600 and art unit 3691. The 31.9% interview lift is a meaningful measured factor that supports evaluating interviews as part of response planning.

The listed companies are Capital One Services LLC, Apple Inc., and Assured Insurance Technologies, Inc. DUANE MORRIS LLP - San Diego, FREDRIKSON & BYRON, P.A., and Grant Attorneys at Law PLLC are the leading listed firms. Counsel can use the company mix to identify financial, consumer technology, and insurance-related matters for comparison.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

63.3%
Allow Rate
+11.3% vs TC avg
573
Total Applications
+31.9%
Interview Lift
1218
Avg Prosecution Days
Based on 548 resolved cases, 2023–2026

Rejection Statute Breakdown

48.3%
§101 Eligibility
12.1%
§102 Novelty
25.7%
§103 Obviousness
9.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18765044 COMPUTER-BASED SYSTEMS HAVING COMPUTING DEVICES PROGRAMMED TO EXECUTE FRAUD DETECTION ROUTINES BASED ON FEATURE SETS ASSOCIATED WITH INPUT FROM PHYSICAL CARDS AND METHODS OF USE THEREOF Non-Final OA Capital One Services, LLC
19418809 PRE-AUTHORIZED TRANSFER Non-Final OA Wells Fargo Bank, N.A.
18935252 USER INTERFACES FOR STORED-VALUE ACCOUNTS Final Rejection Apple Inc.
19280682 SYSTEMS AND METHODS FOR WEATHER-RELATED VEHICLE DAMAGE PREVENTION Non-Final OA State Farm Mutual Automobile Insurance Company
18360424 REAL-TIME DIGITAL SIMULATION AND DAMAGE ASSESSMENT FOR A DETECTED EVENT Non-Final OA International Business Machines Corporation

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Who Appears Before This Examiner

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Frequently Asked Questions

What is examiner Edward Chang's allowance rate?

63.3% of resolved applications examined by Edward Chang were allowed (548 resolved cases), compared with 39.0% across Art Unit 3691 over the last five years.

Does an interview help with examiner Edward Chang?

This examiner's interview lift is +31.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Edward Chang take to allow a patent?

Applications allowed by Edward Chang took 1,218 days on average from filing to allowance.

Which art unit does examiner Edward Chang work in?

Edward Chang examines applications in Art Unit 3691 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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