logo

For the Inventor, By the Inventor

Tokyo, Japan

Toyo Kohan., Ltd.

USPTO Granted Patents = 8

% Expired Patents = 25.0

Forward Citations = 22

Loading Chart...
Loading Chart...

29 inventors (with patents filed for the assignee):

goldMedal Hironao Okayama (2 out of 19 patents)

silverMedal Yasuo Tahara (2 out of 5 patents)

bronzeMedal Tsuneyuki Ide (2 out of 8 patents)

4.  Koh Yoshioka (2 out of 2 patents)

5.  Etsuro Tsutsumi (2 out of 2 patents)

6.  Nobuaki Mukai (1 out of 15 patents)

7.  Akira Ikeda (1 out of 6 patents)

8.  Kinji Saijo (1 out of 26 patents)

9.  Hiroaki Okamoto (1 out of 10 patents)

10.  Hiroaki Kawamura (1 out of 9 patents)

11.  Yoshiyuki Sugimoto (1 out of 6 patents)

12.  Setsuo Takaki (1 out of 1 patent)

13.  Hiroshi Fujishige (1 out of 1 patent)

14.  Yoshihiko Isobe (1 out of 11 patents)

15.  Noriaki Kaguma (1 out of 5 patents)


8 patents:

1. 12692616 - Roughened plated sheet (2026-07-28),
2. 12640375 - Surface-treated sheet for alkaline secondary battery and method for manufacturing same (2026-05-26),
3. 12604417 - Copper clad laminate and method for producing the same (2026-04-14),
4. 12540903 - Pinhole detection device (2026-02-03),
5. 6777863 - Material for aperture grill for color picture tube, process for making the same, aperture grill, and picture tube (2004-08-17),
6. 6583545 - Aperture grill material for color picture tube, production method thereof, aperture grill and picture tube (2003-06-24),
7. 6531242 - Enclosed cell and sealer (2003-03-11),
8. 6200409 - Method and apparatus for manufacturing metallic sheet covered with thermoplastic resin (2001-03-13),
Company Overview
Toyo Kohan Co., Ltd. is a Japanese company primarily engaged in the manufacture and sale of various steel products. The company operates through two business segments: Steel Business and Printing, Packaging, and Information Business. Its products include tinplate, blackplate, tin-free steel, and laminated steel sheets. Toyo Kohan serves customers in the automotive, construction, and packaging industries worldwide.
Profile summary synthesized from public USPTO records and patent filings.

logo

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

8 Patents

#2,151 in Tokyo

#5,049 in Japan

Tokyo, JP
Tokyo, Japan

Toyo Kohan., Ltd.

Forward Citations = 22

29 inventors:

goldMedal Hironao Okayama (2 out of 19 patents)

silverMedal Yasuo Tahara (2 out of 5 patents)

bronzeMedal Tsuneyuki Ide (2 out of 8 patents)

4.  Koh Yoshioka (2 out of 2 patents)

5.  Etsuro Tsutsumi (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Toyo Kohan., Ltd.. Retrieved from https://idiyas.com/company/toyo-kohan

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]
Loading…