Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869623 | Method of broaching outer periphery of lobe-type rotor of roots-type fluid machine, and broaching cutter used in the method | Hajime Takeshita, Takahiro Iwase, Naofumi Masuda, Hiroyuki Mochizuki, Nobuo Kobayashi +2 more | 1989-09-26 |