Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700490 | Compass | Marlin D. Iden | 1987-10-20 |
| D290093 | Compass | Marlin D. Iden | 1987-06-02 |
| 4564909 | Error sensing system for vessels with absolute zero referencing | — | 1986-01-14 |
| 4542464 | Autopilot system | — | 1985-09-17 |
| 4464843 | Angular measurement apparatus with referencing system | — | 1984-08-14 |
| 4438568 | Recreational compass | Marlin D. Iden | 1984-03-27 |
| 4381610 | Self-contained downhole compass | — | 1983-05-03 |
| 4221328 | Data read-out system and apparatus useful for angular measurements | — | 1980-09-09 |