Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7251949 | Refrigerant system | Masaji Yamanaka, Shigeya Ishigaki, Kenzo Matsumoto, Haruhisa Yamasaki | 2007-08-07 |
| 7223082 | Rotary compressor | Kazuya Sato, Kenzo Matsumoto, Kentaro Yamaguchi, Akifumi Tomiuka, Hiromasa Aoki | 2007-05-29 |
| 6692242 | Multi-cylinder rotary compressor | Kenzo Matsumoto, Akira Hashimoto, Masazumi Sakaniwa, Hiroyuki Sawabe | 2004-02-17 |
| 6676393 | Multi-cylinder rotary compressor | Kenzo Matsumoto, Akira Hashimoto, Masazumi Sakaniwa, Hiroyuki Sawabe | 2004-01-13 |
| 6524086 | Multi-cylinder rotary compressor | Kenzo Matsumoto, Akira Hashimoto, Masazumi Sakaniwa, Hiroyuki Sawabe | 2003-02-25 |
| 6336799 | Multi-cylinder rotary compressor | Kenzo Matsumoto, Akira Hashimoto, Masazumi Sakaniwa, Hiroyuki Sawabe | 2002-01-08 |