Forward Citations = 34

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7 inventors (with patents filed for the assignee):

Hiroshi Sakamaki (5 out of 37 patents)

Toshiyuki Maeda (3 out of 9 patents)

Toshimitsu Sakai (2 out of 15 patents)

4. Tadashi Saitou (2 out of 12 patents)

5. Yukio Horikoshi (2 out of 22 patents)

6. Susumu Sugishita (1 out of 14 patents)

7. Kikuji Yanagihashi (1 out of 9 patents)

5 patents: Sort by Forward Citations

1. 4573891 - Rotary sleeve of a rotary compressor (1986-03-04),

2. 4561835 - Floating rotary sleeve of a rotary compressor (1985-12-31),

3. 4163635 - Vane type rotary fluid pumps or compressors (1979-08-07),

4. 4061446 - Rotary air pump or compressor with flexible end sealing plates (1977-12-06),

5. 4050855 - Dry air rotary pump or compressor (1977-09-27),

Nippon Piston Ring Kabushiki Kaisha (NPR) is a leading manufacturer of piston rings for automotive and industrial applications. With a history dating back over 80 years, NPR has built a reputation for quality and innovation in the industry. The company's products are known for their durability, precision, and performance, making them a trusted choice for customers around the world.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

5 Patents

#2,448 in Tokyo

#6,485 in Japan

Tokyo, Japan

Nippon Piston Ring Kabushiki Kaisha