Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679992 | Bearing unit | Matsutaro Miyamoto, Toshiharu Nakazawa | 1997-10-21 |
| 5618167 | Vacuum pump apparatus having peltier elements for cooling the motor & bearing housing and heating the outer housing | Yutaka Hirakawa, Toshiharu Nakazawa | 1997-04-08 |