Enter assignee name

% Expired Patents = 75.0

EPO Patents = 5

Forward Citations = 21

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4 inventors (with patents filed for the assignee):

Hyoji Yoshimura (8 out of 10 patents)

Hirokazu Morii (4 out of 16 patents)

Kenichiro Hirao (1 out of 6 patents)

4. Kazutaka Maruyama (1 out of 4 patents)

5. Katsumi Nakamura (87 patents)

6. Yoshimura Hyoji (0 patent)

7. Morii Hirokazu (0 patent)

8. Hirao Kenichiro (0 patent)

8 patents: Sort by Forward Citations

1. 9447711 - Method for production of valve head portion of hollow engine valve and hollow engine valve (2016-09-20),

2. 9302317 - Method for manufacturing hollow engine valve (2016-04-05),

3. 9194263 - Method for production of valve head portion of hollow engine valve and hollow engine valve (2015-11-24),

4. 8881391 - Method for producing hollow engine valve (2014-11-11),

5. 8713793 - Method for producing metallic-sodium-filled engine valve (2014-05-06),

6. 8650752 - Method for manufacturing valve umbrella portion of hollow engine valve, press device of valve umbrella portion of hollow engine valve, and hollow engine valve (2014-02-18),

7. 8561297 - Method for producing engine valve in which sodium metal is sealed (2013-10-22),

8. 8522434 - Method for production of valve head portion of hollow engine valve and hollow engine valve (2013-09-03),

Yoshimura Company is a Japanese company that specializes in manufacturing high-performance exhaust systems for motorcycles, automobiles, and marine vehicles. With a history dating back to 1954, Yoshimura has established a reputation for quality, performance, and innovation in the industry. In addition to exhaust systems, the company also produces engine components, racing accessories, and apparel for motorsports enthusiasts.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

8 Patents

#111 in Aichi

#5,035 in Japan

Aichi, Japan

Yoshimura Company