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Sumita Optical Glass, Inc.

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USPTO Granted Patents = 57

% Expired Patents = 29.8

EPO Patents = 16

Forward Citations = 418

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58 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. Hiroki Watanabe (13 out of 15 patents)

5. Yoshinobu Suehiro (12 out of 64 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. Tatsuya Tezuka (5 out of 5 patents)

12. Noriyuki Kawata (5 out of 5 patents)

13. Satoshi Wada (4 out of 38 patents)

14. Hideaki Kato (4 out of 34 patents)

15. Hideaki Takaku (4 out of 4 patents)

Core Competencies:

Optical Glass

Light-Emitting Device

Precision Molding

Multicomponent Oxide Glass

Optical Element

Endoscope

Fluorescent Fiber

Optical Fiber

Solid-State Device

Phosphorescent Glass

Relay Optical System

57 patents: Sort by Forward Citations

1. 12727744 - Beam-shaping lens, beam-shaping element, light source device for an endoscope, and endoscope (2026-09-08),

2. 12559413 - Optical glass, preform for precision press molding, and optical element (2026-02-24),

3. 12473227 - Multicomponent oxide glass, optical element, optical fiber, and method of producing multicomponent oxide glass (2025-11-18),

4. 12351502 - Optical glass and optical element (2025-07-08),

5. 12181700 - Optical fiber illumination device (2024-12-31),

6. 11598947 - Relay optical system for rigid endoscope (2023-03-07),

7. 11559196 - Flexible endoscope, and endoscope system equipped with same (2023-01-24),

8. 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),

9. 10611665 - Method of producing LTP or LATP crystal particle (2020-04-07),

10. 10508053 - Image guide fiber (2019-12-17),

11. 9405123 - Optical system (2016-08-02),

12. 9376340 - Optical glass, preform for precision press molding, and optical element (2016-06-28),

13. 9376339 - Optical glass, preform for precision press molding, and optical element (2016-06-28),

14. 9315416 - Method of manufacturing light-emitting device (2016-04-19),

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

Company Overview

Sumita Optical Glass, Inc. is a leading manufacturer based in Saitama, Japan, specializing in advanced optical glass technology. The company focuses on the development and production of high-quality optical components, including precision molded glass and multicomponent oxide glass. Its innovations serve various applications, such as light-emitting devices, endoscopes, and optical fibers, contributing significantly to fields that require precise optical performance. Sumita Optical Glass is committed to advancing optical technology through research and development, ensuring high standards in product quality and performance.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

57 Patents

#28 in Saitama 343-0827

#1,590 in Japan

#12,581 in the World

Sumita Optical Glass, Inc.

Forward Citations = 418

58 inventors:

Naruhito Sawanobori (22 out of 23 patents)

Shinobu Nagahama (15 out of 16 patents)

Kazuya Aida (13 out of 13 patents)

4. Hiroki Watanabe (13 out of 15 patents)

5. Yoshinobu Suehiro (12 out of 64 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sumita Optical Glass, Inc.. Retrieved from https://idiyas.com/company/sumita-optical-glass

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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