Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471494 | Vacuum pumping apparatus | Koichi Nakayama, Yoshihiro Naito, Toyoki Furuhashi | 2002-10-29 |
| 6305910 | Multi-stage pump device | Yoshihiro Naito, Noboru Ohtani, Koichi Nakayama | 2001-10-23 |
| 6056510 | Multistage vacuum pump unit | Hiroya Taniguchi | 2000-05-02 |
| 5010737 | Multi-headed cryopump apparatus | Nobuo Okumura | 1991-04-30 |