Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887033 | Magnetometer having coil formed by two spiral shaped conductors | Roger M. Langdon | 1989-12-12 |
| D299765 | Helmet or similar article | Stephen B. Lewis, John R. Feeney | 1989-02-07 |