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For the Inventor, By the Inventor

Osaka, Japan

Yanmar Co., Ltd.


USPTO Granted Patents = 651

% Expired Patents = 47.8



Trademarks = 15

Forward Citations = 4,422

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571 inventors (with patents filed for the assignee):

goldMedal Kiyoyuki Okuyama (70 out of 85 patents)

silverMedal Shinya Kawashiri (30 out of 30 patents)

bronzeMedal Masataka Mitsuda (22 out of 22 patents)

4.  Kunihiko Matsumoto (20 out of 20 patents)

5.  Hideo Shiomi (18 out of 20 patents)

6.  Kunihiko Sakamoto (15 out of 16 patents)

7.  Yoshiaki Kurokawa (14 out of 22 patents)

8.  Terumitsu Takahata (14 out of 14 patents)

9.  Masamitsu Uemura (14 out of 14 patents)

10.  Hitoshi Adachi (14 out of 16 patents)

11.  Yoshiyuki Sandou (13 out of 16 patents)

12.  Takeshi Ouchida (12 out of 15 patents)

13.  Tomohiro Otani (12 out of 13 patents)

14.  Masaaki Yamashita (12 out of 12 patents)

15.  Taichi Togashi (12 out of 12 patents)


Core Competencies:
Thermoelectric Power Generation
Fuel Injection Device
Engine Controller
Catalytic Reactor
Hydraulic Apparatus
Gas Engine
Work Vehicle
Heat Pump
Ship Steering Device
Exhaust Gas Purification
Urea Solution Spray Nozzle
Diesel Engine

651 patents:

1. 11930707 - Thermoelectric power generation device (2024-03-12),
2. 11569569 - Antenna unit for work vehicle and work vehicle (2023-01-31),
3. 11441491 - Fuel injection device for engine (2022-09-13),
4. 11131365 - Reducer (2021-09-28),
5. 10814274 - Catalytic reactor and ship provided with same (2020-10-27),
6. D896841 - Engine (2020-09-22),
7. 10782692 - Ship handling device (2020-09-22),
8. D896273 - Engine (2020-09-15),
9. 10766335 - Work vehicle with accommodation for air conditioner in rear beam of cabin frame (2020-09-08),
10. 10760505 - Engine device (2020-09-01),
11. 10759270 - Construction machine (2020-09-01),
12. 10747233 - Parallel travel work system (2020-08-18),
13. 10738687 - Engine (2020-08-11),
14. 10732958 - Terminal device and software rewriting program (2020-08-04),
15. 10731617 - Engine device (2020-08-04),
Company Overview
Yanmar Co., Ltd., headquartered in Osaka, Japan, specializes in advanced engine technology and related systems. The company is recognized for its innovations in thermoelectric power generation, fuel injection devices, and engine controllers, contributing to enhanced efficiency and performance in various applications. Yanmar's expertise extends to catalytic reactors, hydraulic apparatus, gas engines, work vehicles, and heat pumps, positioning it as a key player in the global market for sustainable and reliable engine solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

Yanmar Co., Ltd. USPTO Patent Assignee Logo
651 Patents

#42 in Osaka

#312 in Japan

#1,526 in the World

Osaka, JP
Osaka, Japan

Yanmar Co., Ltd.

Forward Citations = 4,422

571 inventors:

goldMedal Kiyoyuki Okuyama (70 out of 85 patents)

silverMedal Shinya Kawashiri (30 out of 30 patents)

bronzeMedal Masataka Mitsuda (22 out of 22 patents)

4.  Kunihiko Matsumoto (20 out of 20 patents)

5.  Hideo Shiomi (18 out of 20 patents)

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