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For the Inventor, By the Inventor

Tokyo, Japan

Adamant Co., Ltd.


USPTO Granted Patents = 15

% Expired Patents = 6.7


Forward Citations = 146

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35 inventors (with patents filed for the assignee):

goldMedal Yuki Ueno (5 out of 6 patents)

silverMedal Tsutomu Okamoto (5 out of 5 patents)

bronzeMedal Yoshihiro Iijima (5 out of 5 patents)

4.  Takehiro Hayashi (2 out of 30 patents)

5.  Masaru Sasaki (2 out of 3 patents)

6.  Masahiro Abumi (2 out of 3 patents)

7.  Nobuhiko Oda (2 out of 3 patents)

8.  Yasuhiro Hyakutake (2 out of 16 patents)

9.  Hikaru Muto (1 out of 2 patents)

10.  Shinichi Takeda (1 out of 13 patents)

11.  Kazuyuki Syoji (1 out of 2 patents)

12.  Koji Horiguchi (1 out of 3 patents)

13.  Yoshitada Beppu (1 out of 2 patents)

14.  Tadahisa Iikubo (1 out of 3 patents)

15.  Tomohide Aoyagi (1 out of 8 patents)


15 patents:

1. 10254482 - Mode scrambler (2019-04-09),
2. D817286 - Optical fiber array (2018-05-08),
3. 9845064 - Steering-wheel power generation device (2017-12-19),
4. 9841570 - Optical fiber assembly, optical coupling device, and optical fiber coupling device (2017-12-12),
5. D801280 - Multi-fiber optical connector ferrule (2017-10-31),
6. D801279 - Multi-fiber optical connector with housing for optical connector (2017-10-31),
7. D795819 - Optical fiber array (2017-08-29),
8. D788042 - Optical fiber array (2017-05-30),
9. 9612407 - Optical coupler for multicore fiber (2017-04-04),
10. 9588150 - Electric current measuring apparatus (2017-03-07),
11. D778840 - Block for transformation of optical path (2017-02-14),
12. D777681 - Optical fiber array (2017-01-31),
13. 9477048 - Sleeve for optical communication and method of manufacturing the sleeve for optical communication (2016-10-25),
14. D766443 - Orthodontic bracket (2016-09-13),
15. D749742 - Skin moisture meter (2016-02-16),
Company Overview
Adamant Co., Ltd. is a Tokyo-based company specializing in advanced materials and components, particularly in the fields of semiconductor manufacturing and optical devices. The organization focuses on the development of high-performance materials that enhance the efficiency and reliability of electronic devices. With a commitment to innovation, Adamant engages in extensive research and development to support various industries, including electronics and telecommunications, contributing to technological advancements on a global scale.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

15 Patents

#1,541 in Tokyo

#3,447 in Japan

#39,959 in the World

Tokyo, JP
Tokyo, Japan

Adamant Co., Ltd.

Forward Citations = 146

35 inventors:

goldMedal Yuki Ueno (5 out of 6 patents)

silverMedal Tsutomu Okamoto (5 out of 5 patents)

bronzeMedal Yoshihiro Iijima (5 out of 5 patents)

4.  Takehiro Hayashi (2 out of 30 patents)

5.  Masaru Sasaki (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Adamant Co., Ltd.. Retrieved from https://idiyas.com/company/adamant-company

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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