Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7042811 | Frictionless, non-destructive playback system for cylinder recordings | William A. Penn | 2006-05-09 |
| 4998497 | Mooring system for vessels | Gregory J. Nelson | 1991-03-12 |