Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876265 | Process and compositions for controlling mites parasitizing on honey bees | — | 1989-10-24 |
| 4872080 | Protective circuit for a semiconductor laser | Christian Hentschel | 1989-10-03 |