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Tokyo, undefined

Hoya Glass Works, Ltd.

USPTO Granted Patents = 18

Forward Citations = 226

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17 inventors (with patents filed for the assignee):

Tetsuro Izumitani (11 out of 30 patents)

Yoshiyuki Asahara (5 out of 21 patents)

Kenji Nakagawa (5 out of 9 patents)

4. Toshiharu Yamashita (3 out of 22 patents)

5. Hiroji Sagara (2 out of 9 patents)

6. Kunimitsu Kobayashi (2 out of 2 patents)

7. Hidemi Tajima (1 out of 13 patents)

8. Tetsuro Izumitani (1 out of 1 patent)

9. Toshiharu Yamashita (1 out of 1 patent)

10. Ko Itaya (1 out of 1 patent)

11. Masaaki Osagawa (1 out of 1 patent)

12. Yoshijuki Asahara (1 out of 1 patent)

13. Yasuo Fukuoka (1 out of 1 patent)

14. Susumu Horikawa (1 out of 1 patent)

15. Yoshito Nogami (1 out of 1 patent)

18 patents: Sort by Forward Citations

1. 4277523 - Method of preventing tarnishing of polished glass articles (1981-07-07),

2. 4239645 - Phosphate base laser glasses (1980-12-16),

3. 4108621 - Process of producing soft aperture filter (1978-08-22),

4. 4097258 - Optical fiber (1978-06-27),

5. 4065283 - Method for making a glass-based soft-edged aperture filters (1977-12-27),

6. 4055435 - Glass compositions for ophthalmic lenses (1977-10-25),

7. 4043852 - Anomalous dispersion glass exhibiting the anomalous partially dispersing (1977-08-23),

8. 4042526 - Non-crystalline substance having an optical memory effect (1977-08-16),

9. 4001019 - Reversible light sensitive glass (1977-01-04),

10. 3998647 - Reversible light-sensitive glass (1976-12-21),

11. 3971723 - Glass for Faraday rotator element (1976-07-27),

12. 3966448 - Sealing method for laser glass (1976-06-29),

13. 3966447 - Heat absorbing sealing method for laser glass (1976-06-29),

14. 3961931 - Apparatus for heat-bonding optical fibers (1976-06-08),

15. 3959000 - High strength glass made by ion exchange (1976-05-25),

Hoya Glass Works, Ltd. is a Japanese company known for its production of high-quality optical glass and lenses. With a history dating back to 1941, Hoya has developed a strong reputation in the field of precision optics. The company also manufactures products for medical and imaging industries, as well as glass substrates for electronics. Hoya continues to innovate and expand its global presence in the optical industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

18 Patents

#10 in Tokyo

#3,056 in J

#33,186 in the World

Tokyo, undefined

Hoya Glass Works, Ltd.

Forward Citations = 226

17 inventors:

Tetsuro Izumitani (11 out of 30 patents)

Yoshiyuki Asahara (5 out of 21 patents)

Kenji Nakagawa (5 out of 9 patents)

4. Toshiharu Yamashita (3 out of 22 patents)

5. Hiroji Sagara (2 out of 9 patents)

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