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Diamet Corporation

USPTO Granted Patents = 50

% Expired Patents = 24.0

CIPO Patents = 1

EPO Patents = 44

Trademarks = 1

Forward Citations = 37

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33 inventors (with patents filed for the assignee):

Tsuneo Maruyama (25 out of 29 patents)

Yoshinari Ishii (19 out of 23 patents)

Teruo Shimizu (9 out of 11 patents)

4. Shinichi Takezoe (8 out of 8 patents)

5. Yoshiki Tamura (7 out of 7 patents)

6. Hideo Sakai (7 out of 7 patents)

7. Takashi Nakai (4 out of 6 patents)

8. Kinya Kawase (4 out of 9 patents)

9. Hajime Kouno (3 out of 3 patents)

10. Jyun Katou (3 out of 3 patents)

11. Yasuhiro Tsukada (3 out of 3 patents)

12. Gakuji Uozumi (3 out of 11 patents)

13. Ryoji Nakayama (3 out of 21 patents)

14. Muneaki Watanabe (3 out of 9 patents)

15. Tomoe Obata (2 out of 2 patents)

Core Competencies:

Sintered Bearing

Oil-Impregnated

Cu-Based Alloy

Heat-Resistant Material

Powder Metallurgy

Magnetic Core

Molding Method

Corrosion Resistance

Wear Resistance

Sliding Member

Composite Material

Motor Pump

50 patents: Sort by Forward Citations

1. 12359282 - Method for manufacturing Cu—Ni—Al-based sintered alloy (2025-07-15),

2. 12296390 - Insert bearing and manufacturing method thereof, sintered bearing suitable for insert bearing, sintered insert component and manufacturing method thereof, and sintered component suitable for sintered insert component (2025-05-13),

3. 12109745 - Insert sintered part and manufacturing method for same (2024-10-08),

4. 11999088 - Insert sintered part and manufacturing method for same (2024-06-04),

5. 11648611 - Sintered oil-impregnated bearing (2023-05-16),

6. 11578393 - Heat-resistant sintered material having excellent high-temperature wear resistance and salt damage resistance and method for producing same (2023-02-14),

7. 11498127 - Device and method for manufacturing multilayer molded article (2022-11-15),

8. 11446737 - Molding die and molding method (2022-09-20),

9. 11441608 - Sintered bearing for motor-type fuel pump and production method therefor (2022-09-13),

10. 11353063 - Sintered bearing (2022-06-07),

11. 11248654 - Oil impregnated sintered bearing and production method thereof (2022-02-15),

12. 11183321 - Powder magnetic core with silica-based insulating film, method of producing the same, and electromagnetic circuit component (2021-11-23),

13. 11073178 - Oil-impregnated sintered bearing and method for manufacturing the same (2021-07-27),

14. 10941465 - Cu-based sintered sliding material, and production method therefor (2021-03-09),

15. 10865828 - Oil-impregnated sintered bearing (2020-12-15),

Company Overview

Diamet Corporation, headquartered in Niigata, Japan, specializes in the development and manufacturing of advanced sintered materials. The company focuses on innovative solutions in sintered bearings, oil-impregnated components, and copper-based alloys, catering to various industrial applications. With expertise in powder metallurgy and molding methods, Diamet also emphasizes the creation of heat-resistant and corrosion-resistant materials, as well as magnetic cores, positioning itself as a leader in the field of material science.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

50 Patents

#7 in Niigata

#1,709 in Japan

#14,013 in the World

Diamet Corporation

Forward Citations = 37

33 inventors:

Tsuneo Maruyama (25 out of 29 patents)

Yoshinari Ishii (19 out of 23 patents)

Teruo Shimizu (9 out of 11 patents)

4. Shinichi Takezoe (8 out of 8 patents)

5. Yoshiki Tamura (7 out of 7 patents)

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

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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