Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841316 | Photohead system for positioning an aperture wheel and method of making an aperture disc | Bruce L. Davidson, Henry F. Berdat | 1989-06-20 |
| 4816847 | High resonance drive table and method of making a planar work surface | — | 1989-03-28 |