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Forward Citations = 77

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14 inventors (with patents filed for the assignee):

Hiroshi Imai (3 out of 76 patents)

Masayuki Kikuchi (1 out of 35 patents)

Yoshimitsu Takeda (1 out of 10 patents)

4. Hisao Ichinose (1 out of 6 patents)

5. Tsuyoshi Sato (1 out of 7 patents)

6. Minoru Shibata (1 out of 2 patents)

7. Hiroshi Kogawa (1 out of 1 patent)

8. Makoto Nagayama (1 out of 1 patent)

9. Hiroshi Hasegawa (1 out of 12 patents)

10. Yoshimasa Tuchiya (1 out of 9 patents)

11. Yoshinori Katayama (1 out of 5 patents)

12. Tsunetoshi Nishimaki (1 out of 1 patent)

13. Ryoji Fujiwara (1 out of 1 patent)

14. Masanori Sakai (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 5090764 - Vehicle body construction for hardtop convertible (1992-02-25),

2. 4995665 - Sunroof structure for motor vehicle (1991-02-26),

3. 4839544 - Apparatus for driving a curtain (1989-06-13),

4. 4438972 - Operating mechanism for operating a sliding and tilting roof-panel (1984-03-27),

5. 4168594 - Remote controller for hinged window (1979-09-25),

Johnan Seisakusho Co., Ltd. is a Japanese company specializing in the production of precision machinery components. With over 50 years of experience, the company has established a reputation for high-quality products and excellent customer service. Johnan Seisakusho is committed to innovation and continuous improvement, offering a range of services including CNC machining, precision grinding, and assembly. Visit the website for more information on their capabilities and portfolio.

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Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

5 Patents

#25 in both of

#6,488 in Japan

both of, Japan

Johnan Seisakusho Co., Ltd.