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For the Inventor, By the Inventor

Osaka, Japan

Big Daishowa Co., Ltd.

Calculating rank
USPTO Granted Patents = 8


Trademarks = 22

Forward Citations = 3

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13 inventors (with patents filed for the assignee):

goldMedal Kouichi Uemura (4 out of 4 patents)

silverMedal Masataka Yauchi (4 out of 5 patents)

bronzeMedal Reina Oohashi (4 out of 4 patents)

4.  Shunsuke Kumasaki (4 out of 4 patents)

5.  Akihito Funashoku (4 out of 4 patents)

6.  Yukio Tsujita (3 out of 3 patents)

7.  Joji Nakatani (2 out of 2 patents)

8.  Naoki Maegawa (1 out of 2 patents)

9.  Masayuki Doi (1 out of 6 patents)

10.  Hirokazu Suruga (1 out of 5 patents)

11.  Yasuyuki Ishida (1 out of 1 patent)

12.  Hidemori Kawashita (1 out of 1 patent)

13.  Yasuhiro Ishimoto (1 out of 1 patent)

14.  Hirotsune Ozaki (1 patent)

15.  Tsuyoshi Komine (12 patents)


8 patents:

1. 12248295 - System for adjusting balance and runout of rotary tool, device for determining the balance and runout, method of adjusting the balance and runout, and tool holder (2025-03-11),
2. 12210332 - System for adjusting balance and runout of rotary tool, device for determining the balance and runout, method of adjusting the balance and runout, and tool holder (2025-01-28),
3. 12032351 - System for adjusting balance and runout of rotary tool, device for determining the balance and runout, method of adjusting the balance and runout, and tool holder (2024-07-09),
4. 11471954 - Tool clamping method of tool holder and the tool holder (2022-10-18),
5. 11255654 - Misalignment determining device (2022-02-22),
6. 10967471 - Chuck device (2021-04-06),
7. 10730117 - Tool chuck, tool holding method and tool removing method (2020-08-04),
8. 10189137 - Tool shape measuring apparatus (2019-01-29),
Company Overview
Big Daishowa Co., Ltd. is a leading manufacturer of high-precision tooling and measuring instruments for the metalworking industry. With over 70 years of experience, the company provides innovative solutions to improve productivity and quality in machining processes. Their products are known for their unmatched accuracy, reliability, and performance, making them a trusted partner for customers worldwide.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Big Daishowa Co., Ltd. USPTO Patent Assignee Logo
8 Patents

#543 in Osaka

#5,050 in Japan

Osaka, JP
Osaka, Japan

Big Daishowa Co., Ltd.

Forward Citations = 3

13 inventors:

goldMedal Kouichi Uemura (4 out of 4 patents)

silverMedal Masataka Yauchi (4 out of 5 patents)

bronzeMedal Reina Oohashi (4 out of 4 patents)

4.  Shunsuke Kumasaki (4 out of 4 patents)

5.  Akihito Funashoku (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Big Daishowa Co., Ltd.. Retrieved from https://idiyas.com/company/big-daishowa-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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