Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11441682 | Piston ring, reciprocating compressor, method for selecting piston ring and method for evaluating life of piston ring | Tomohiro Ootsuka | 2022-09-13 |
| 11346332 | Piston ring and compressor | Tomohiro OTSUKA, Hirotaka Ito, Hiroaki NII | 2022-05-31 |
| 11267162 | Kneading rotor and batch-type kneading machine | Akira Konishi, Yasuaki Yamane | 2022-03-08 |