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Nihon Radiator Co., Ltd.

USPTO Granted Patents = 49

Forward Citations = 530

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74 inventors (with patents filed for the assignee):

Eizo Suyama (4 out of 12 patents)

Yoshiharu Sakai (3 out of 3 patents)

Noriaki Sonoda (3 out of 3 patents)

4. Akira Kitsukawa (3 out of 3 patents)

5. Koji Murayama (3 out of 3 patents)

6. Yoshikazu Takamatsu (2 out of 30 patents)

7. Hisatoshi Hirota (2 out of 62 patents)

8. Shiro Ikuta (2 out of 5 patents)

9. Shigeyoshi Yokoyama (2 out of 4 patents)

10. Tetsuo Fukazawa (2 out of 5 patents)

11. Hiroshi Hasui (2 out of 4 patents)

12. Yukio Shimada (2 out of 15 patents)

13. Hidetoshi Ogida (2 out of 2 patents)

14. Mitsuo Sawabe (2 out of 2 patents)

15. Kouichi Imai (2 out of 2 patents)

Core Competencies:

Heat Exchanger

Air Conditioning

Compressor

Automobile

Cooling System

Muffler

Evaporator

Fuel Tank Cap

Pressure Transducer

Motor Actuator

Centrifugal Pump

Oil Cooler

49 patents: Sort by Forward Citations

1. D308407 - Liquid tank for use in the cooling cycle of an air conditioning device (1990-06-05),

2. 4911262 - Muffler (1990-03-27),

3. 4901907 - Heat exchanger core made of aluminum and method for application of flux (1990-02-20),

4. 4878001 - Drive control device for motor actuator in automobile air conditioner (1989-10-31),

5. 4871894 - Methods and apparatus for manufacturing piston rods (1989-10-03),

6. 4870828 - Cooling system in motor vehicle (1989-10-03),

7. 4867648 - Variable displacement wobble plate type compressor for automotive air (1989-09-19),

8. 4865249 - Safety device (1989-09-12),

9. 4860549 - Variable displacement wobble plate type compressor (1989-08-29),

10. 4833882 - Exhaust manifold for multicylinder internal combustion engine (1989-05-30),

11. 4829208 - Flat motor having a rotatable shaft, a stepped portion formed in said (1989-05-09),

12. 4820132 - Variable displacement wobble plate type compressor (1989-04-11),

13. 4809518 - Laminate type evaporator with expansion valve (1989-03-07),

14. 4796694 - Cooling fin for heat exchanger (1989-01-10),

15. 4785287 - Oil condition detecting apparatus (1988-11-15),

Company Overview

Nihon Radiator Co., Ltd., based in Tokyo, specializes in the development and manufacturing of advanced cooling systems and automotive technologies. The company focuses on air conditioning solutions, heat exchangers, and variable displacement compressors, catering to the automotive sector and beyond. With expertise in muffler design and centrifugal pumps, Nihon Radiator is committed to enhancing efficiency and performance in thermal management and oil condition detection, contributing to innovative solutions in the automotive industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

49 Patents

#810 in Tokyo

#1,738 in Japan

#14,293 in the World

Nihon Radiator Co., Ltd.

Forward Citations = 530

74 inventors:

Eizo Suyama (4 out of 12 patents)

Yoshiharu Sakai (3 out of 3 patents)

Noriaki Sonoda (3 out of 3 patents)

4. Akira Kitsukawa (3 out of 3 patents)

5. Koji Murayama (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nihon Radiator Co., Ltd.. Retrieved from https://idiyas.com/company/nihon-radiator-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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