Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4697992 | Piston ring for a piston in a refrigerant compressor | Hideharu Hatakeyama | 1987-10-06 |
| 4594055 | Piston assembly for a refrigerant compressor | Hideharu Hatakeyama | 1986-06-10 |