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For the Inventor, By the Inventor

Tokyo, Japan

Hakusan Corporation

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USPTO Granted Patents = 18

% Expired Patents = 5.6



Trademarks = 6

Forward Citations = 5

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26 inventors (with patents filed for the assignee):

goldMedal Moriaki Kobayashi (5 out of 6 patents)

silverMedal Motohito Takezaki (5 out of 5 patents)

bronzeMedal Shohei Ueno (5 out of 6 patents)

4.  Minoru Yoshida (2 out of 133 patents)

5.  Hideki Kamitsuna (1 out of 7 patents)

6.  Li-Yun Chen (1 out of 4 patents)

7.  Shigeo Hirose (1 out of 17 patents)

8.  Ryo Nagase (1 out of 3 patents)

9.  Kazumasa Tsukada (1 out of 2 patents)

10.  Shigeyuki Tsurumi (1 out of 1 patent)

11.  Kazumasa Yasuda (1 out of 1 patent)

12.  Takeshi Sotome (1 out of 1 patent)

13.  Mikio Koyano (1 out of 3 patents)

14.  Takeshi Toyoda (1 out of 1 patent)

15.  Akinari Matoba (1 out of 1 patent)


18 patents:

1. 12775141 - Ferrule, optical connector, and method for manufacturing ferrule (2026-10-27),
2. D1148707 - Cap for optical fiber connector (2026-09-22),
3. 12736759 - Optical fiber assembly, plate, and optical module (2026-09-15),
4. 12674943 - Multi-fiber optical connector ferrule and optical module (2026-07-07),
5. 12624973 - Optical fiber sensor utilizing faraday rotator mirrors and measuring system using the same (2026-05-12),
6. D1117080 - Optical fiber connector (2026-03-10),
7. D1115707 - Optical fiber connector (2026-03-03),
8. D1113754 - Ferrule holder for optical fiber connectors (2026-02-17),
9. D1113753 - Ferrule holder for optical fiber connectors (2026-02-17),
10. 12535640 - Optical fiber termination structure, optical connection component and hollow-core optical fiber (2026-01-27),
11. D1109702 - Clip for optical fiber connectors (2026-01-20),
12. D1102390 - Optical fiber connector (2025-11-18),
13. D1102389 - Optical connector (2025-11-18),
14. 12397452 - Long arm (2025-08-26),
15. 11520108 - Optic fiber connecting device and optic fiber adaptor thereof (2022-12-06),
Company Overview
Hakusan Corporation, headquartered in Tokyo, specializes in the development and manufacturing of advanced materials and components for various industries. The company focuses on innovative solutions in fields such as electronics, automotive, and environmental technology. With a commitment to research and development, Hakusan aims to enhance product performance and sustainability through cutting-edge technologies. Its expertise in material science positions it as a key player in driving advancements across multiple sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

18 Patents

#1,414 in Tokyo

#3,125 in Japan

#34,263 in the World

Tokyo, JP
Tokyo, Japan

Hakusan Corporation

Forward Citations = 5

26 inventors:

goldMedal Moriaki Kobayashi (5 out of 6 patents)

silverMedal Motohito Takezaki (5 out of 5 patents)

bronzeMedal Shohei Ueno (5 out of 6 patents)

4.  Minoru Yoshida (2 out of 133 patents)

5.  Hideki Kamitsuna (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hakusan Corporation. Retrieved from https://idiyas.com/company/hakusan

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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