Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357437 | Magnetic marker position fixing system for underwater vehicles | — | 1994-10-18 |
| 5331276 | Apparatus for passively measuring the velocity of a ferrous vehicle along a path of travel | David G. Ellerbrake | 1994-07-19 |