Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6183326 | Communication buoy with ice penetrating capabilities | Peter J. Stein, Douglas W. Andersen | 2001-02-06 |
| 5591907 | Weatherproof sensing apparatus with rotatable sensor | Peter J. Stein, Michael G. Fitzgerald, Douglas W. Andersen | 1997-01-07 |