Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832715 | Fine particle collector arrangement for vacuum pumps | — | 1989-05-23 |
| 4816046 | Fine particle collector trap for vacuum evacuating system | Yoshiyasu Maeba, Satoru Toyoda | 1989-03-28 |