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For the Inventor, By the Inventor

Okayama, Japan

Uchiyama Manufacturing Corp.


USPTO Granted Patents = 74

% Expired Patents = 36.5


Forward Citations = 239

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107 inventors (with patents filed for the assignee):

goldMedal Masanori Tomioka (8 out of 8 patents)

silverMedal Yoshihiko Yamaguchi (6 out of 6 patents)

bronzeMedal Hiroshi Seno (6 out of 6 patents)

4.  Masanori Shibayama (5 out of 5 patents)

5.  Koki Ishida (5 out of 5 patents)

6.  Tatsuo Katayama (4 out of 4 patents)

7.  Tomokazu Sumida (4 out of 4 patents)

8.  Kenji Matsumoto (4 out of 8 patents)

9.  Hideo Mizuta (4 out of 4 patents)

10.  Tomohisa Yamamoto (3 out of 3 patents)

11.  Koji Makino (3 out of 3 patents)

12.  Katsunori Matsuki (3 out of 3 patents)

13.  Tadashi Kasamoto (3 out of 3 patents)

14.  Keita Yamamoto (3 out of 3 patents)

15.  Nobumitsu Okazaki (3 out of 4 patents)


Core Competencies:
Sealing Device
Gasket
Rubber Composition
Bearing Sealing
Magnetic Encoder
Vibration Damping
Cooling Structure
Fuel Injection Valve
Magnetization Method
Annular Gasket
Cork Stopper
Tone Wheel

74 patents:

1. 12467504 - Sealing device (2025-11-11),
2. 12442411 - Sealing device (2025-10-14),
3. 12404933 - Sealing device (2025-09-02),
4. 12372187 - Connection structure of pipe (2025-07-29),
5. 12221588 - Grease composition and sealing device using same (2025-02-11),
6. 12196317 - Sealing device (2025-01-14),
7. 11592107 - Gasket (2023-02-28),
8. 11549002 - Rubber composition and rubber molded product (2023-01-10),
9. 11421738 - Bearing sealing device (2022-08-23),
10. 11371611 - Seal member for bearing and production method therefor (2022-06-28),
11. 10796834 - Magnetization method, magnetization apparatus and magnet for magnetic encoder (2020-10-06),
12. 10794324 - Spacer (2020-10-06),
13. 10703026 - Method for producing cork stopper and cork stopper (2020-07-07),
14. 10527101 - Bearing sealing device (2020-01-07),
15. 10520036 - Sealing device (2019-12-31),
Company Overview
Uchiyama Manufacturing Corp., based in Okayama, Japan, specializes in sealing technology, focusing on the development and production of high-performance sealing devices and gaskets. The company is recognized for its expertise in rubber compositions and innovative solutions for bearing sealing, vibration damping, and cooling structures. Additionally, Uchiyama plays a significant role in the automotive sector with advancements in fuel injection valves and magnetic encoders, contributing to enhanced efficiency and reliability in various applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

74 Patents

#4 in Okayama

#1,366 in Japan

#10,131 in the World

Okayama, JP
Okayama, Japan

Uchiyama Manufacturing Corp.

Forward Citations = 239

107 inventors:

goldMedal Masanori Tomioka (8 out of 8 patents)

silverMedal Yoshihiko Yamaguchi (6 out of 6 patents)

bronzeMedal Hiroshi Seno (6 out of 6 patents)

4.  Masanori Shibayama (5 out of 5 patents)

5.  Koki Ishida (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Uchiyama Manufacturing Corp.. Retrieved from https://idiyas.com/company/uchiyama-manufacturing

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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