Prosecution Insights
Last updated: October 26, 2026

Edward H Tso, USPTO Patent Examiner

Listed by the USPTO as TSO, EDWARD H

Tech Center 2800 • Art Units: 2838 2858 2859

This examiner grants 87% of resolved cases

Analysis

TSO, EDWARD H is a USPTO patent examiner in Tech Center 2800 and art unit 2838. The examiner has 1305 resolved cases, an allowance rate of 87.0%, and a median of 820 days to allowance. The interview lift is 6.7%, indicating a positive but limited association between interviews and allowance outcomes.

The listed companies are Samsung SDI Co., Ltd., MILWAUKEE ELECTRIC TOOL Corporation, and Apple Inc. The listed firms are LEE IP LAW, P.C., Womble Bond Dickinson US LLP, and APPLE INC. - Fletcher. The large case record and high allowance rate support clear claim presentation, while interviews remain a useful supplement when specific issues require clarification.

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

Performance Statistics

87.0%
Allow Rate
+19.0% vs TC avg
1,331
Total Applications
+6.7%
Interview Lift
820
Avg Prosecution Days
Based on 1305 resolved cases, 2023–2026

Rejection Statute Breakdown

6.4%
§101 Eligibility
27.8%
§102 Novelty
31.1%
§103 Obviousness
16.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18479309 BATTERY CHARGER Non-Final OA MILWAUKEE ELECTRIC TOOL CORPORATION
18342065 RECONFIGURABLE BATTERY PACK Non-Final OA Apple Inc.
18613743 BATTERY PACK, POWER TOOL SYSTEM AND COMMUNICATION SYSTEM THEREOF Non-Final OA Techtronic Cordless GP
18381290 ELECTRIC VEHICLE CHARGE CONNECTOR Non-Final OA Black & Decker, Inc.
18396343 ELECTRICITY FEEDING CONTROL SERVER AND VEHICLE LENDING SYSTEM Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18566490 MULTI-BATTERY POWER SUPPLY, CHARGING/DISCHARGING METHOD, AND ELECTRONIC DEVICE Non-Final OA Honor Device Co., Ltd.
18607742 BATTERY MANAGEMENT APPARATUS AND BATTERY MANAGEMENT METHOD Non-Final OA SAMSUNG SDI CO., LTD.
18540023 DEVICE AND METHOD FOR CONTROLLING CHARGING OF BATTERY PACK Non-Final OA SAMSUNG SDI CO., LTD.
18384718 BATTERY SYSTEM AND MONITORING METHOD OF BATTERY SYSTEM Non-Final OA SAMSUNG SDI CO., LTD.
18486041 BATTERY PACK Non-Final OA Samsung SDI Co., Ltd.
18427422 POWER SUPPLY CONTROL APPARATUS AND POWER SUPPLY APPARATUS Non-Final OA MURATA MANUFACTURING CO., LTD.
18239997 CELL BALANCING USING AN EXTERNAL POWER SOURCE Non-Final OA TEXAS INSTRUMENTS INCORPORATED
18568517 MOTIVE POWER ELECTRICAL ENERGY STORAGE SYSTEMS AND METHODS Non-Final OA Enatel

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Frequently Asked Questions

What is examiner Edward H Tso's allowance rate?

87.0% of resolved applications examined by Edward H Tso were allowed (1,305 resolved cases), compared with 76.3% across Art Unit 2838 over the last five years.

Does an interview help with examiner Edward H Tso?

This examiner's interview lift is +6.7 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 H Tso take to allow a patent?

Applications allowed by Edward H Tso took 820 days on average from filing to allowance.

Which art unit does examiner Edward H Tso work in?

Edward H Tso examines applications in Art Unit 2838 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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