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Sumita Optical Glass, Inc.

USPTO Granted Patents = 55

EPO Patents = 16

Forward Citations = 413

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57 inventors (with patents filed for the assignee):

Naruhito Sawanobori (22 out of 23 patents)

Shinobu Nagahama (15 out of 16 patents)

Kazuya Aida (13 out of 13 patents)

4. Yoshinobu Suehiro (12 out of 64 patents)

5. Hiroki Watanabe (12 out of 14 patents)

6. Yoshinori Yamamoto (11 out of 17 patents)

7. Masaaki Ohtsuka (7 out of 7 patents)

8. Seiji Yamaguchi (7 out of 18 patents)

9. Masaaki Yamazaki (7 out of 7 patents)

10. Masaaki Otsuka (7 out of 8 patents)

11. Noriyuki Kawata (5 out of 5 patents)

12. Tatsuya Tezuka (4 out of 4 patents)

13. Satoshi Wada (4 out of 37 patents)

14. Hideaki Kato (4 out of 34 patents)

15. Hideaki Takaku (4 out of 4 patents)

Core Competencies:

Multicomponent Oxide Glass

Optical Fiber

Endoscope System

Lithium Phosphorus Complex Oxide

Light-Emitting Device

Optical Glass

Precision Molding

Solid-State Optical Device

Phosphorescent Glass

Fluorescent Glass

Infrared-to-Visible Up-Conversion

Optical System

55 patents: Sort by Forward Citations

1. 12473227 - Multicomponent oxide glass, optical element, optical fiber, and method of producing multicomponent oxide glass (2025-11-18),

2. 12351502 - Optical glass and optical element (2025-07-08),

3. 12181700 - Optical fiber illumination device (2024-12-31),

4. 11598947 - Relay optical system for rigid endoscope (2023-03-07),

5. 11559196 - Flexible endoscope, and endoscope system equipped with same (2023-01-24),

6. 11345597 - Precursor glass of lithium phosphorus complex oxide and method of producing same, method of producing precursor crystallized glass of lithium phosphorus complex oxide, and lithium phosphorus complex oxide powder and method of producing same (2022-05-31),

7. 10611665 - Method of producing LTP or LATP crystal particle (2020-04-07),

8. 10508053 - Image guide fiber (2019-12-17),

9. 9405123 - Optical system (2016-08-02),

10. 9376340 - Optical glass, preform for precision press molding, and optical element (2016-06-28),

11. 9376339 - Optical glass, preform for precision press molding, and optical element (2016-06-28),

12. 9315416 - Method of manufacturing light-emitting device (2016-04-19),

13. D753859 - Helmet-mounted light (2016-04-12),

14. D753858 - Helmet-mounted light (2016-04-12),

15. D753857 - Helmet-mounted light (2016-04-12),

Sumita Optical Glass, Inc. is a leading manufacturer and supplier of precision optical glass products. With expertise in glass manufacturing since 1963, we offer a wide range of high-quality optical materials and components for various industries. Our products include optical lenses, prisms, filters, mirrors, windows, and more. We are committed to delivering innovative solutions, exceptional customer service, and reliable products that meet the highest industry standards. Visit our website to learn more about our capabilities and explore our product offerings.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

55 Patents

#29 in Saitama 343-0827

#1,584 in Japan

#12,577 in the World

Sumita Optical Glass, Inc.

Forward Citations = 413

57 inventors:

Naruhito Sawanobori (22 out of 23 patents)

Shinobu Nagahama (15 out of 16 patents)

Kazuya Aida (13 out of 13 patents)

4. Yoshinobu Suehiro (12 out of 64 patents)

5. Hiroki Watanabe (12 out of 14 patents)

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