Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618167 | Vacuum pump apparatus having peltier elements for cooling the motor & bearing housing and heating the outer housing | Shun-ichi Aiyoshizawa, Toshiharu Nakazawa | 1997-04-08 |