Prosecution Insights
Last updated: October 27, 2026

Yoshihisa Ishizuka, USPTO Patent Examiner

Listed by the USPTO as ISHIZUKA, YOSHIHISA

Tech Center 3700 • Art Units: 2857 2863 2865 3797

This examiner grants 69% of resolved cases

Analysis

ISHIZUKA, YOSHIHISA is a USPTO patent examiner in Tech Center 3700 and Art Unit 2857. Across 444 resolved cases, the allowance rate is 69.1%, with a median of 1301 days to allowance. Interview lift is 19.5%, showing a positive association between interviews and allowance outcomes.

The leading companies are Samsung Electronics Co., Ltd., Fuji Corporation, and Chevron U.s.a. Inc. The listed firms are Bochner PLLC, Maschoff Brennan, and Muncy, Geissler, Olds & Lowe, P.C. Practitioners may use interviews as a constructive part of prosecution while planning for a relatively extended path to allowance.

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

Performance Statistics

69.1%
Allow Rate
-0.9% vs TC avg
471
Total Applications
+19.5%
Interview Lift
1301
Avg Prosecution Days
Based on 444 resolved cases, 2023–2026

Rejection Statute Breakdown

24.1%
§101 Eligibility
4.7%
§102 Novelty
34.3%
§103 Obviousness
33.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18189990 SYSTEM AND METHOD FOR IDENTIFYING KERNELS SUITABLE FOR COMPUTATIONAL STORAGE Final Rejection Samsung Electronics Co., Ltd.
18688936 BEHAVIOR MONITORING SYSTEM AND BEHAVIOR MONITORING METHOD Non-Final OA FUJI CORPORATION
18581194 SYSTEMS, METHODS, AND DEVICES FOR BATTERY MANAGEMENT AND MEASUREMENT Non-Final OA Cypress Semiconductor Corporation
18655605 ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY PHASE AND AMPLITUDE DETECTION OF A STIMULATED SYSTEM Non-Final OA STMICROELECTRONICS INTERNATIONAL N.V.
18277729 NOWCASTING USING GENERATIVE NEURAL NETWORKS Final Rejection DeepMind Technologies Limited
18383007 NON-DESTRUCTIVE THREE-DIMENSIONAL PROBING AND CHARACTERIZATION OF SPECIMENS Non-Final OA Applied Materials Israel Ltd.
18664932 TEST ARRANGEMENT FOR TESTING A SURROUNDINGS SENSOR AND METHOD FOR TESTING A SURROUNDINGS SENSOR Non-Final OA dSPACE GmbH
18369112 METHOD AND APPARATUS FOR IDENTIFYING FALLING OBJECT BASED ON LIDAR SYSTEM, AND READABLE STORAGE MEDIUM Final Rejection INNOVUSION (WUHAN) CO., LTD.

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Frequently Asked Questions

What is examiner Yoshihisa Ishizuka's allowance rate?

69.1% of resolved applications examined by Yoshihisa Ishizuka were allowed (444 resolved cases), compared with 72.0% across Art Unit 2857 over the last five years.

Does an interview help with examiner Yoshihisa Ishizuka?

This examiner's interview lift is +19.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Yoshihisa Ishizuka take to allow a patent?

Applications allowed by Yoshihisa Ishizuka took 1,301 days on average from filing to allowance.

Which art unit does examiner Yoshihisa Ishizuka work in?

Yoshihisa Ishizuka examines applications in Art Unit 2857 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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