Issued Patents All Time
Showing 1–8 of 8 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 |
| 4747763 | Rotor assembly of roots pump | Hisao Shirai, Yoshio Kuroiwa, Katsuro Harada, Kichiro Kato, Naofumi Masuda | 1988-05-31 |
| 4730963 | Broaching machine for external broaching of rotor | Yosio Kuroiwa, Hosao Shirai, Sakae Sugishima | 1988-03-15 |
| 4717322 | Roots-type fluid machine | Naofumi Masuda, Hajime Takeshita, Takahiro Iwase, Hiroyuki Mochizuki, Takashi Miyake +1 more | 1988-01-05 |
| 4701085 | Method and apparatus for external broaching of resin-coated parts | Yosio Kuroiwa | 1987-10-20 |
| 4693813 | 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 | 1987-09-15 |
| 4647008 | Solenoid valve for hydraulic control | Hisao Shirai, Takashi Izuo | 1987-03-03 |
| 4644815 | Lubrication device in transmissions | Ken-ichi Kawano, Kouiti Kouketu | 1987-02-24 |