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For the Inventor, By the Inventor

Tokyo, Japan

Tgk Co., Inc.


USPTO Granted Patents = 139

% Expired Patents = 50.4


Forward Citations = 998

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65 inventors (with patents filed for the assignee):

goldMedal Hisatoshi Hirota (61 out of 62 patents)

silverMedal Takeshi Kaneko (26 out of 67 patents)

bronzeMedal Shinji Saeki (15 out of 17 patents)

4.  Masaaki Tonegawa (13 out of 13 patents)

5.  Ryosuke Satake (12 out of 12 patents)

6.  Katsumi Koyama (12 out of 12 patents)

7.  Takeshi Watanabe (11 out of 147 patents)

8.  Tokumi Tsugawa (11 out of 11 patents)

9.  Takanao Kumakura (10 out of 10 patents)

10.  Toshiyuki Shiota (8 out of 8 patents)

11.  Isao Sendo (6 out of 6 patents)

12.  Michio Matsumoto (5 out of 8 patents)

13.  Toshihiro Andoh (5 out of 5 patents)

14.  Takashi Sannomiya (5 out of 5 patents)

15.  Yuusuke Inoue (5 out of 9 patents)


Core Competencies:
Control Valve
Expansion Valve
Motor Actuator
Variable Displacement Compressor
Electromagnetic Valve
Automotive Air Conditioner
Refrigeration Cycle
Fluid Control Valve
Three-Way Valve
Switching Valve
Constant Flow Rate
Vibration-Proof Spring

139 patents:

1. 10948099 - Motor operated valve (2021-03-16),
2. 10883480 - Control valve for variable displacement compressor (2021-01-05),
3. 10837431 - Control valve for variable displacement compressor (2020-11-17),
4. 10801480 - Control valve for variable displacement compressor (2020-10-13),
5. 10760559 - Control valve for variable displacement compressor (2020-09-01),
6. 10557463 - Control valve for variable displacement compressor (2020-02-11),
7. D854655 - Expansion valve (2019-07-23),
8. 10323752 - Butterfly valve (2019-06-18),
9. 10310522 - Control valve (2019-06-04),
10. 10309702 - Control valve (2019-06-04),
11. 10260786 - Electromagnetic valve (2019-04-16),
12. 10190807 - Expansion valve (2019-01-29),
13. 10132540 - Motor operated valve apparatus and motor operated valve controller (2018-11-20),
14. 10113539 - Control valve for variable displacement compressor (2018-10-30),
15. 10107534 - Expansion valve and pipe mounting structure thereof (2018-10-23),
Company Overview
Tgk Co., Inc., based in Tokyo, specializes in the development and manufacturing of advanced control valves and related technologies. The company focuses on key areas such as motor actuators, expansion valves, and electromagnetic valves, primarily for automotive air conditioning and refrigeration systems. With a commitment to innovation in fluid control solutions, Tgk plays a significant role in enhancing the efficiency and performance of automotive and industrial applications, contributing to advancements in climate control technologies.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

Tgk Co., Inc. USPTO Patent Assignee Logo
139 Patents

#446 in Tokyo

#904 in Japan

#5,821 in the World

Tokyo, JP
Tokyo, Japan

Tgk Co., Inc.

Forward Citations = 998

65 inventors:

goldMedal Hisatoshi Hirota (61 out of 62 patents)

silverMedal Takeshi Kaneko (26 out of 67 patents)

bronzeMedal Shinji Saeki (15 out of 17 patents)

4.  Masaaki Tonegawa (13 out of 13 patents)

5.  Ryosuke Satake (12 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tgk Co., Inc.. Retrieved from https://idiyas.com/company/tgk-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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