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Tomei Sangyo Kabushiki Kaisha

USPTO Granted Patents = 22

CIPO Patents = 2

Forward Citations = 269

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32 inventors (with patents filed for the assignee):

Toru Kawaguchi (6 out of 11 patents)

Akira Nakagawa (6 out of 6 patents)

Hideaki Kamiya (4 out of 4 patents)

4. Makoto Nakagawa (3 out of 13 patents)

5. Yoshiko Oi (2 out of 2 patents)

6. Takuo Kato (2 out of 2 patents)

7. Yasukichi Yanagihara (2 out of 2 patents)

8. Osamu Yamamoto (1 out of 27 patents)

9. Ichiro Ando (1 out of 22 patents)

10. Hisao Tanaka (1 out of 47 patents)

11. Satoru Matsumoto (1 out of 11 patents)

12. Yasuyuki Kato (1 out of 5 patents)

13. Kenji Kodama (1 out of 5 patents)

14. Takanori Shibata (1 out of 6 patents)

15. Kazuo Simizu (1 out of 2 patents)

22 patents: Sort by Forward Citations

1. 5487788 - Method for cleaning and disinfecting contact lens (1996-01-30),

2. 5460658 - Method for cleaning or preserving a contact lens by means of liquid (1995-10-24),

3. 5409731 - Method for imparting a hydrophilic nature to a contact lens (1995-04-25),

4. 5409546 - Method for cleaning, preserving and disinfecting contact lenses (1995-04-25),

5. 5401431 - Cleaning-preserving aqueous solution for contact lenses and method for (1995-03-28),

6. 5314823 - Method for cleaning a contact lens (1994-05-24),

7. 5314590 - Method for cleaning and disinfecting soft contact lens and treating (1994-05-24),

8. 5302312 - Detergent for contact lens comprising a water-soluble compound and a (1994-04-12),

9. 5283053 - Apparatus for treating contact lenses and contact lens treating vessel (1994-02-01),

10. 5281277 - Liquid composition for contact lenses and method for cleaning a contact (1994-01-25),

11. 5246552 - Method for cleaning and disinfecting soft contact lens and treating (1993-09-21),

12. 5244470 - Method for marking a water-absorptive contact lens: dyeing dry lens with (1993-09-14),

13. 5206298 - Graft copolymer, solution containing the graft copolymer for treating (1993-04-27),

14. 5142009 - Hard contact lens material (1992-08-25),

15. 5134213 - Polymer-type polymerization initiator (1992-07-28),

Tomei Sangyo Kabushiki Kaisha is a leading manufacturer of industrial machinery and equipment based in Japan. With over 50 years of experience, the company specializes in providing custom solutions for a wide range of industries including automotive, aerospace, and electronics. Their innovative products and services have earned them a reputation for excellence in quality and reliability.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

22 Patents

#38 in Nagoya

#2,725 in Japan

#27,905 in the World

Tomei Sangyo Kabushiki Kaisha

Forward Citations = 269

32 inventors:

Toru Kawaguchi (6 out of 11 patents)

Akira Nakagawa (6 out of 6 patents)

Hideaki Kamiya (4 out of 4 patents)

4. Makoto Nakagawa (3 out of 13 patents)

5. Yoshiko Oi (2 out of 2 patents)

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