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For the Inventor, By the Inventor

Hiroshima, Japan

Hirotec Corporation


USPTO Granted Patents = 21

% Expired Patents = 23.8


Trademarks = 1

Forward Citations = 116

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40 inventors (with patents filed for the assignee):

goldMedal Makoto Tominaga (2 out of 2 patents)

silverMedal Kiminori Washika (2 out of 2 patents)

bronzeMedal Ikuo Nishikawa (2 out of 7 patents)

4.  Toshihiko Oonishi (2 out of 4 patents)

5.  Katsumi Tomioka (2 out of 7 patents)

6.  Kouji Shimoichi (2 out of 2 patents)

7.  Takehiro Shibata (1 out of 1 patent)

8.  Sho Takai (1 out of 1 patent)

9.  Kohei Horike (1 out of 1 patent)

10.  Yousuke Kawahito (1 out of 1 patent)

11.  Takahiro Tochioka (1 out of 22 patents)

12.  Naoyuki Kobayashi (1 out of 2 patents)

13.  Etsuo Kosaka (1 out of 1 patent)

14.  Kazuo Tanigawa (1 out of 1 patent)

15.  Masaru Kono (1 out of 1 patent)


21 patents:

1. 11826964 - Method of bonding thermoplastic resin and metal (2023-11-28),
2. 11253902 - Hemming apparatus (2022-02-22),
3. 10792720 - Hemming device and hemming method (2020-10-06),
4. 10744719 - Method for bonding metal and resin and metal resin bonded body (2020-08-18),
5. 8146251 - Method of manufacturing catalytic converters (2012-04-03),
6. 8065902 - Hemming apparatus (2011-11-29),
7. 8033155 - Press die set for forming flange and flange forming method (2011-10-11),
8. 7575408 - Work conveying method and conveying apparatus employing the conveying method (2009-08-18),
9. 7451785 - Flexible tube (2008-11-18),
10. 7434443 - Compound press-forming apparatus and compound press-forming method (2008-10-14),
11. 7390049 - Vehicle door (2008-06-24),
12. 7111894 - Automobile door structure (2006-09-26),
13. 6378348 - Hemming process and hemming apparatus (2002-04-30),
14. 6295858 - Hemming apparatus (2001-10-02),
15. 6177029 - Photostorage and emissive material which provides color options (2001-01-23),
Company Overview
Hirotec Corporation, headquartered in Hiroshima, Japan, specializes in advanced automotive technologies, focusing on manufacturing and developing innovative solutions for the automotive industry. The company is recognized for its expertise in areas such as automotive body manufacturing, sealing technologies, and environmental technologies. With a commitment to quality and sustainability, Hirotec plays a significant role in enhancing vehicle performance and efficiency, contributing to the evolution of the automotive sector on a global scale.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

21 Patents

#23 in Hiroshima, 729-3431

#2,861 in Japan

#29,928 in the World

Hiroshima, JP
Hiroshima, Japan

Hirotec Corporation

Forward Citations = 116

40 inventors:

goldMedal Makoto Tominaga (2 out of 2 patents)

silverMedal Kiminori Washika (2 out of 2 patents)

bronzeMedal Ikuo Nishikawa (2 out of 7 patents)

4.  Toshihiko Oonishi (2 out of 4 patents)

5.  Katsumi Tomioka (2 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hirotec Corporation. Retrieved from https://idiyas.com/company/hirotec

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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