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For the Inventor, By the Inventor

Hamamatsu, Japan

Hamamatsu-Photonics K.k.

USPTO Granted Patents = 3,139

% Expired Patents = 14.4



Trademarks = 57

Forward Citations = 18,351

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1,556 inventors (with patents filed for the assignee):

goldMedal Katsumi Shibayama (239 out of 264 patents)

silverMedal Takeshi Sakamoto (87 out of 88 patents)

bronzeMedal Seiichiro Mizuno (83 out of 84 patents)

4.  Takafumi Yokino (78 out of 97 patents)

5.  Kenshi Fukumitsu (78 out of 78 patents)

6.  Takayuki Ohmura (75 out of 75 patents)

7.  Masaharu Muramatsu (75 out of 75 patents)

8.  Tomofumi Suzuki (73 out of 73 patents)

9.  Daiki Suzuki (72 out of 73 patents)

10.  Hideki Shimoi (69 out of 69 patents)

11.  Hiroyuki Kyushima (69 out of 74 patents)

12.  Fumitsugu Fukuyo (68 out of 68 patents)

13.  Takashi Inoue (66 out of 92 patents)

14.  Masahiro Kotani (62 out of 62 patents)

15.  Naoki Uchiyama (62 out of 86 patents)


Core Competencies:
Photodetection Device
X-ray Detection
Laser Machining
Semiconductor Device
Optical Imaging
Quantum Cascade Laser
Light Detection
Observation Method
Radiographic Imaging
Photoelectric Conversion
Optical Amplification
Electromagnetic Wave Detection

3,139 patents:

1. 12772366 - Inductively coupled plasma light source with switched power supply (2026-10-20),
2. 12770379 - Feature output model generation system, feature output model generation method, feature output model generation program, and feature output model (2026-10-20),
3. 12769016 - Light detection device (2026-10-20),
4. 12768676 - Optical module for encoder, encoder, and method for manufacturing optical module for encoder (2026-10-20),
5. D1153241 - Display screen or portion thereof with transitional graphical user interface (2026-10-13),
6. 12762647 - Image acquisition device (2026-10-13),
7. 12754412 - Optical module (2026-10-06),
8. 12749873 - Quantum cascade laser element and quantum cascade laser device (2026-09-29),
9. 12748316 - Polarized light separation element and optical reception device (2026-09-29),
10. 12748047 - Observation device and observation method (2026-09-29),
11. D1149156 - Base for flash lamp (2026-09-22),
12. 12744177 - X-ray tube (2026-09-22),
13. 12742838 - Optically pumped magnetometer and magnetoencephalograph (2026-09-22),
14. 12742730 - Adsorption evaluation apparatus and adsorption evaluation method (2026-09-22),
15. 12742637 - Film thickness measuring device and film thickness measuring method (2026-09-22),
Company Overview
Hamamatsu Photonics K.K., headquartered in Hamamatsu, Japan, specializes in photodetection technology, focusing on the development and manufacturing of advanced photodetection devices. The company is recognized for its innovations in X-ray detection, laser machining, and optical imaging, contributing significantly to various fields including medical diagnostics and industrial applications. With expertise in semiconductor devices and quantum cascade lasers, Hamamatsu plays a pivotal role in enhancing light detection and observation methods across diverse scientific and technological domains.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Hamamatsu-Photonics K.k. USPTO Patent Assignee Logo
3,139 Patents

#2 in Hamamatsu

#76 in Japan

#296 in the World

Hamamatsu, JP
Hamamatsu, Japan

Hamamatsu-Photonics K.k.

Forward Citations = 18,351

1,556 inventors:

goldMedal Katsumi Shibayama (239 out of 264 patents)

silverMedal Takeshi Sakamoto (87 out of 88 patents)

bronzeMedal Seiichiro Mizuno (83 out of 84 patents)

4.  Takafumi Yokino (78 out of 97 patents)

5.  Kenshi Fukumitsu (78 out of 78 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hamamatsu-Photonics K.k.. Retrieved from https://idiyas.com/company/hamamatsu-photonics-k-k

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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