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For the Inventor, By the Inventor

Tokyo, Japan

Tohnichi Mfg. Co., Ltd.

Calculating rank
USPTO Granted Patents = 14


Trademarks = 3

Forward Citations = 103

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18 inventors (with patents filed for the assignee):

goldMedal Seiji Ito (8 out of 18 patents)

silverMedal Tomohiro Ogata (7 out of 7 patents)

bronzeMedal Kyoichi Komatsu (7 out of 7 patents)

4.  Hiroshi Tsuji (6 out of 51 patents)

5.  Osamu Tsuji (3 out of 3 patents)

6.  Tetsuya Yokoyama (3 out of 9 patents)

7.  Yasuhiro Yamamoto (2 out of 122 patents)

8.  Nobuyoshi Kobayashi (2 out of 39 patents)

9.  Satoshi Takaku (2 out of 2 patents)

10.  Naoya Masuda (2 out of 2 patents)

11.  Shozo Aikawa (2 out of 2 patents)

12.  Shinji Murayama (1 out of 1 patent)

13.  Yoshiro Kanda (1 out of 1 patent)

14.  Koichi Shimura (1 out of 1 patent)

15.  Sinji Murayama (1 out of 1 patent)


14 patents:

1. 11819964 - Nut and bolt tightening method and tightening device (2023-11-21),
2. 11772213 - Tightening device (2023-10-03),
3. 11660713 - Fastening device (2023-05-30),
4. 11364580 - Fastening device (2022-06-21),
5. 10850376 - Tensioning device (2020-12-01),
6. 10828759 - Tensioning device (2020-11-10),
7. 10794416 - Tensioning device (2020-10-06),
8. 9956673 - Tightening tool (2018-05-01),
9. 9770816 - Angle wrench and rotation angle-measuring device (2017-09-26),
10. 9199364 - Torque driver (2015-12-01),
11. 9021921 - Torque wrench (2015-05-05),
12. 8485049 - Torque tool device (2013-07-16),
13. 8443702 - Torque wrench (2013-05-21),
14. 6698298 - Torque wrench for further tightening inspection (2004-03-02),
Company Overview
Tohnichi Mfg. Co., Ltd. is a prominent manufacturer based in Tokyo, specializing in precision measurement and control instruments. The company focuses on developing torque tools, including torque wrenches and torque testers, which are essential in various industries such as automotive, aerospace, and electronics. Tohnichi is committed to innovation and quality, ensuring that its products meet rigorous standards for accuracy and reliability, thus supporting the advancement of manufacturing processes globally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

14 Patents

#1,599 in Tokyo

#3,584 in Japan

#42,290 in the World

Tokyo, JP
Tokyo, Japan

Tohnichi Mfg. Co., Ltd.

Forward Citations = 103

18 inventors:

goldMedal Seiji Ito (8 out of 18 patents)

silverMedal Tomohiro Ogata (7 out of 7 patents)

bronzeMedal Kyoichi Komatsu (7 out of 7 patents)

4.  Hiroshi Tsuji (6 out of 51 patents)

5.  Osamu Tsuji (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tohnichi Mfg. Co., Ltd.. Retrieved from https://idiyas.com/company/tohnichi-mfg-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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