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Yanmar Diesel Engine Co., Ltd.

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USPTO Granted Patents = 53

% Expired Patents = 1.9

Trademarks = 5

Forward Citations = 678

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95 inventors (with patents filed for the assignee):

Toshihiko Kawabe (7 out of 7 patents)

Koichi Amemori (5 out of 5 patents)

Manabu Miyazaki (3 out of 4 patents)

4. Kazuyoshi Shinada (3 out of 3 patents)

5. Tosio Banba (3 out of 3 patents)

6. Yosuke Takahashi (3 out of 3 patents)

7. Minoru Shimada (2 out of 8 patents)

8. Masami Kondo (2 out of 2 patents)

9. Mitsunori Iwata (2 out of 2 patents)

10. Kazuto Usui (2 out of 2 patents)

11. Toshio Banba (2 out of 2 patents)

12. Michisuke Nagasaki (2 out of 2 patents)

13. Kinichi Aso (2 out of 2 patents)

14. Takanori Tsugekawa (2 out of 2 patents)

15. Masakuni Matsui (2 out of 2 patents)

Core Competencies:

Hydraulic Continuously Variable Transmission

Fuel Injection Pump

Internal Combustion Engine

Marine Propulsion Systems

Diesel Engine

Swash Plate Angle Control

Torsional Vibration

Gas-Diesel Dual Fuel Engine

Air-Cooled Engine

Power Transmitting Device

Knocking Control

Exhaust System

53 patents: Sort by Forward Citations

1. 6782839 - Hydrofoil boat (2004-08-31),

2. 6684634 - Swash plate angle control mechanism of hydraulic continuously variable transmission (2004-02-03),

3. 6679740 - Method of hydraulically controlling a marine speed reducing and reversing machine in crash astern operation (2004-01-20),

4. 6478646 - Drive device of inboard and outboard engines (2002-11-12),

5. 6463905 - Low noise package storing type engine working machine (2002-10-15),

6. 6431140 - Intake port shape of internal combustion engine (2002-08-13),

7. 6421615 - Torsional vibration measuring instrument and torsional vibration measuring method (2002-07-16),

8. 6330797 - Hydraulic circuit for turning excavator (2001-12-18),

9. 6293880 - Vibro-isolating supporting structure for vertical crankshaft internal combustion engine (2001-09-25),

10. 6290009 - Swivel working vehicle (2001-09-18),

11. 6289720 - Method of knocking control of internal combustion engine (2001-09-18),

12. 5992393 - V type diesel engine (1999-11-30),

13. 5190004 - Internal combustion engine (1993-03-02),

14. 5161490 - Air-cooled internal combustion engine (1992-11-10),

15. 5072627 - Starting apparatus for an engine (1991-12-17),

Company Overview

Yanmar Diesel Engine Co., Ltd., headquartered in Osaka, Japan, specializes in the development and manufacturing of advanced internal combustion engines. The company is recognized for its innovations in hydraulic continuously variable transmission, fuel injection systems, and marine propulsion technologies. Yanmar's expertise extends to diesel engines and gas-diesel dual fuel engines, focusing on enhancing performance and efficiency. With a commitment to engineering excellence, Yanmar plays a significant role in the global engine market, catering to diverse industrial and marine applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

53 Patents

#180 in Osaka

#1,652 in Japan

#13,357 in the World

Yanmar Diesel Engine Co., Ltd.

Forward Citations = 678

95 inventors:

Toshihiko Kawabe (7 out of 7 patents)

Koichi Amemori (5 out of 5 patents)

Manabu Miyazaki (3 out of 4 patents)

4. Kazuyoshi Shinada (3 out of 3 patents)

5. Tosio Banba (3 out of 3 patents)

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