Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866384 | Relative phase magnetic field direction indicating devices useful as compasses | — | 1989-09-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866384 | Relative phase magnetic field direction indicating devices useful as compasses | — | 1989-09-12 |