Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876691 | Ion laser | Eric Blumer | 1989-10-24 |
| 4852265 | Level/plumb indicator with tilt compensation | Henry L. Schwartz | 1989-08-01 |
| 4823349 | Resonator module and blower module assembly | Dale E. Koop | 1989-04-18 |
| 4795389 | Method of making an ion laser tube | Eric Blumer | 1989-01-03 |