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Fukuoka-shi, Japan

Showa Manufacturing Co., Ltd.

USPTO Granted Patents = 20

EPO Patents = 3

Forward Citations = 383

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29 inventors (with patents filed for the assignee):

Toshio Ohma (2 out of 5 patents)

Toshifumi Yamamoto (2 out of 2 patents)

Takumi Sakaguchi (2 out of 2 patents)

4. Hitoshi Okayasu (2 out of 2 patents)

5. Shinjiro Kuwayama (1 out of 13 patents)

6. Masao Takahashi (1 out of 1 patent)

7. Akira Nishio (1 out of 1 patent)

8. Nobuo Iwatani (1 out of 1 patent)

9. Masaharu Kusuhara (1 out of 1 patent)

10. Yasuyuki Hayashi (1 out of 6 patents)

11. Yoshio Negishi (1 out of 1 patent)

12. Hidekuni Itoh (1 out of 1 patent)

13. Kiyosaburo Koyama (1 out of 1 patent)

14. Sachio Nyui (1 out of 1 patent)

15. Tamotsu Nakamura (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 10774398 - Far-infrared radiation multi-stage type heating furnace for steel sheets for hot stamping (2020-09-15),

2. 6752624 - Soaking apparatus (2004-06-22),

3. 5328196 - Wheel suspension system for bicycle (1994-07-12),

4. 4546959 - Shock absorber having adjustable damping means including an auxiliary (1985-10-15),

5. 4515384 - Front wheel suspension system for a motorcycle (1985-05-07),

6. 4493490 - Front fork for cycle (1985-01-15),

7. 4438909 - Vehicle front fork (1984-03-27),

8. 4438908 - Spring receiving structure for hydraulic shock absorber (1984-03-27),

9. 4424980 - Front fork for motorcycle or the like (1984-01-10),

10. 4422661 - Height adjusting system for motorcycle (1983-12-27),

11. 4413837 - Device for adjusting the height of vehicles (1983-11-08),

12. 4392664 - Front fork of motorcycle (1983-07-12),

13. 4380847 - Device for mounting gas spring for opening automobile hatch door (1983-04-26),

14. 4308018 - Trim-tilt device for marine propulsion devices (1981-12-29),

15. 4171839 - Buffer for a bumper (1979-10-23),

Showa Manufacturing Co., Ltd. is a leading global manufacturer of automotive and industrial components. With a focus on precision engineering and innovation, the company produces a wide range of products including shock absorbers, power steering systems, and hydraulic equipment. Showa is committed to providing high-quality, reliable solutions to meet the needs of its customers worldwide.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

20 Patents

#2 in Fukuoka-shi

#2,885 in Japan

#30,346 in the World

Fukuoka-shi, Japan

Showa Manufacturing Co., Ltd.

Forward Citations = 383

29 inventors:

Toshio Ohma (2 out of 5 patents)

Toshifumi Yamamoto (2 out of 2 patents)

Takumi Sakaguchi (2 out of 2 patents)

4. Hitoshi Okayasu (2 out of 2 patents)

5. Shinjiro Kuwayama (1 out of 13 patents)

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