Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8449195 | Retainer of ball bearing | — | 2013-05-28 |
| 5632597 | Thread groove type vacuum pump | Seiji Hiroki, Tetsuya Abe, Yoshio Murakami, Junichi Nakamura | 1997-05-27 |
| 5221179 | Vacuum pump | Tatsuji Ikegami, Tetsuro Ohbayashi, Keiichi Yoshida | 1993-06-22 |
| 5219269 | Vacuum pump | Tatsuji Ikegami, Tetsuro Ohbayashi, Keiichi Yoshida | 1993-06-15 |
| 5217346 | Vacuum pump | Tatsuji Ikegami, Tetsuro Ohbayashi, Keiichi Yoshida | 1993-06-08 |
| 5160250 | Vacuum pump with a peripheral groove pump unit | Tatsuji Ikegami, Tetsuro Ohbayashi, Keiichi Yoshida | 1992-11-03 |
| 5074747 | Vacuum pump | Tatsuji Ikegami, Tetsuro Ohbayashi, Keiichi Yoshida | 1991-12-24 |
| 4708586 | Thread groove type vacuum pump | Tadashi Sawada, Tatsuji Ikegami | 1987-11-24 |