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For the Inventor, By the Inventor

Higashiosaka, Japan

Tomoe Technical Research Company Ltd.

Calculating rank
USPTO Granted Patents = 14

% Expired Patents = 14.3

Forward Citations = 278

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22 inventors (with patents filed for the assignee):

goldMedal Jiro Kamezawa (2 out of 2 patents)

silverMedal Takayoshi Uno (2 out of 2 patents)

bronzeMedal Mikimaro Nakanishi (2 out of 2 patents)

4.  Jiro Kamesawa (1 out of 1 patent)

5.  Hideo Hagiwara (1 out of 1 patent)

6.  Kouichi Hisada (1 out of 1 patent)

7.  Kazuhiko Ogawa (1 out of 2 patents)

8.  Kouzi Kawai (1 out of 1 patent)

9.  Takeshi Yamamoto (1 out of 1 patent)

10.  Toshiharu Tanaka (1 out of 1 patent)

11.  Kamezawa Jiro (1 out of 1 patent)

12.  Toshimi Minami (1 out of 1 patent)

13.  Hidematu Sioda (1 out of 1 patent)

14.  Yoshinori Manki (1 out of 1 patent)

15.  Takayoshi Uno, Deceased (1 out of 1 patent)


14 patents:

1. 7090193 - Butterfly valve (2006-08-15),
2. 6991210 - Actuator for driving a valve (2006-01-31),
3. 6338468 - Butterfly valve with low noise (2002-01-15),
4. 5490660 - Manual device for valve (1996-02-13),
5. 5482252 - Seat ring and butterfly valve fitting this seat ring thereto (1996-01-09),
6. 5150731 - Butterfly valve to prevent dew condensation therefrom (1992-09-29),
7. 5029811 - Butterfly valve (1991-07-09),
8. 4926903 - Butterfly valve having a function for measuring a flow rate and method (1990-05-22),
9. 4318422 - Butterfly valve (1982-03-09),
10. 4289297 - Butterfly valve (1981-09-15),
11. 4235258 - Driving device for opening and closing a valve (1980-11-25),
12. 4063710 - Reduction apparatus for opening and closing a valve (1977-12-20),
13. 4025050 - Butterfly valve (1977-05-24),
14. 4014511 - Butterfly valve (1977-03-29),
Company Overview
Tomoe Technical Research Company Ltd. is a prominent entity based in Higashiosaka, Japan, specializing in advanced engineering solutions and innovative technologies. The company focuses on the development and manufacturing of precision machinery and components, catering to various industries including automotive, electronics, and manufacturing. With a commitment to research and development, Tomoe Technical Research aims to enhance productivity and efficiency through cutting-edge technology and tailored solutions for its clients.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

14 Patents

#1 in Higashiosaka

#3,585 in Japan

#42,312 in the World

Higashiosaka, JP
Higashiosaka, Japan

Tomoe Technical Research Company Ltd.

Forward Citations = 278

22 inventors:

goldMedal Jiro Kamezawa (2 out of 2 patents)

silverMedal Takayoshi Uno (2 out of 2 patents)

bronzeMedal Mikimaro Nakanishi (2 out of 2 patents)

4.  Jiro Kamesawa (1 out of 1 patent)

5.  Hideo Hagiwara (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tomoe Technical Research Company Ltd.. Retrieved from https://idiyas.com/company/tomoe-technical-research-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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