EPO Patents = 5

Forward Citations = 2

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14 inventors (with patents filed for the assignee):

Yukio Tomita (3 out of 15 patents)

Takayuki Wakabayashi (2 out of 5 patents)

Kenjiro Nabeshima (2 out of 4 patents)

4. Hirotaka Yamamoto (2 out of 3 patents)

5. Toshiro Namatame (1 out of 1 patent)

6. Toshihiko Arii (1 out of 1 patent)

7. Takanori Wakabayashi (1 out of 1 patent)

8. Kazushi Tomita (1 out of 1 patent)

9. Kazushi Tomita (0 patent)

10. Yukio Japan Hamworthy & Co Ltd Tomita (0 patent)

11. Shoichi Japan Hamworthy & Co Ltd Fujii (0 patent)

12. Takanori Japan Hamworthy & Co Ltd Wakabayashi (0 patent)

13. Takashi Japan Hamworthy & Co Ltd Morimoto (0 patent)

14. Yoshimasa Japan Hamworthy & Co Ltd Eguchi (0 patent)

4 patents: Sort by Forward Citations

1. 11915595 - Collision-avoidance maneuvering method in congested water and collision-avoidance maneuvering system for single-propeller twin-rudder ship (2024-02-27),

2. 9567998 - Working oil chamber sealing system of rotary vane steering gear actuator (2017-02-14),

3. 7872739 - Rudder angle detecting device of steering gear (2011-01-18),

4. 6886485 - Twin-rudder system for large ship (2005-05-03),

Japan Hamworthy & Co., Ltd. is a leading supplier of marine and offshore equipment for the Japanese market. With a strong reputation for quality products and reliable service, the company specializes in providing solutions for fuel systems, pumps, and environmental protection systems. Through innovative technology and industry expertise, Japan Hamworthy & Co., Ltd. continues to drive efficiency and sustainability in the maritime industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

4 Patents

#708 in Osaka

#7,416 in Japan

Osaka, Japan

Japan Hamworthy & Co., Ltd.