Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953304 | Mask compass | Per-Olof JANSSON | 1990-09-04 |
| D305739 | Compass clinometer | — | 1990-01-30 |
| D283682 | Sighting compass/vertical angle metering device | — | 1986-05-06 |
| D283683 | Sighting compass/vertical angle meter | — | 1986-05-06 |