Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7208685 | Hardened voyage data recorder | Margaret J. Browning, Gregory W. Purdom | 2007-04-24 |
| 6706966 | Hardened voyage data recorder | Margaret J. Browning, Gregory W. Purdom | 2004-03-16 |