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Kanagawa, Japan

Lumentum Japan, Inc.

USPTO Granted Patents = 67

Forward Citations = 46

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67 inventors (with patents filed for the assignee):

Atsushi Nakamura (13 out of 72 patents)

Shigetaka Hamada (8 out of 8 patents)

Koichiro Adachi (7 out of 59 patents)

4. Hiroshi Hamada (7 out of 64 patents)

5. Yasushi Sakuma (7 out of 17 patents)

6. Takayuki Nakajima (7 out of 11 patents)

7. Osamu Kagaya (6 out of 84 patents)

8. Daisuke Noguchi (6 out of 87 patents)

9. Shunya Yamauchi (6 out of 11 patents)

10. Yoshihiro Nakai (6 out of 54 patents)

11. Ryosuke Nakajima (6 out of 6 patents)

12. Kouji Nakahara (5 out of 29 patents)

13. Takashi Toyonaka (5 out of 12 patents)

14. Shigehisa Tanaka (5 out of 22 patents)

15. Hideaki Asakura (5 out of 6 patents)

Core Competencies:

Optical Semiconductor Device

Semiconductor Laser

Electro-absorption Modulator

Optical Module

Optical Subassembly

Light-emitting Device

Optical Communication

Photodiode

Transmission Equipment

Transceiver Module

Circuit Board

Differential Circuit Board

67 patents: Sort by Forward Citations

1. 12573815 - Semiconductor laser for preventing hole burning effect (2026-03-10),

2. 12283793 - Semiconductor optical device (2025-04-21),

3. 12272929 - Optical semiconductor device (2025-04-08),

4. 12261412 - Electro-absorption modulator (2025-03-25),

5. 12218480 - Semiconductor optical amplifier integrated laser (2025-02-04),

6. 12126138 - Optical semiconductor device and semiconductor light-emitting device (2024-10-22),

7. 12100929 - Semiconductor optical device and method for manufacturing the same (2024-09-24),

8. 12082336 - Differential circuit board and semiconductor light emitting device (2024-09-03),

9. 12046870 - Optical semiconductor device (2024-07-23),

10. 12040596 - Optical semiconductor device, optical subassembly, and optical module (2024-07-16),

11. 12027823 - Semiconductor laser (2024-07-02),

12. 12027822 - Optical semiconductor device (2024-07-02),

13. 11916161 - Semiconductor light-receiving element (2024-02-27),

14. 11909170 - Semiconductor light emitting device and optical subassembly (2024-02-20),

15. 11880098 - Semiconductor optical device (2024-01-23),

Company Overview

Lumentum Japan, Inc. is a prominent player in the optical semiconductor devices sector, specializing in the development and manufacturing of advanced technologies such as semiconductor lasers, electro-absorption modulators, and optical modules. The company focuses on delivering innovative solutions for optical communication and light-emitting devices, catering to a diverse range of applications. Based in Kanagawa, Japan, Lumentum is committed to pushing the boundaries of optical technology to enhance connectivity and communication capabilities globally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

67 Patents

#51 in Kanagawa

#1,444 in Japan

#11,040 in the World

Kanagawa, Japan

Lumentum Japan, Inc.

Forward Citations = 46

67 inventors:

Atsushi Nakamura (13 out of 72 patents)

Shigetaka Hamada (8 out of 8 patents)

Koichiro Adachi (7 out of 59 patents)

4. Hiroshi Hamada (7 out of 64 patents)

5. Yasushi Sakuma (7 out of 17 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Lumentum Japan, Inc.. Retrieved from https://idiyas.com/company/lumentum-japan

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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