Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6767099 | System and method for displaying physical objects in space | Richard Perkins | 2004-07-27 |
| 5509656 | Electronic maze puzzle | Howard H. Berger, Richard Perkins | 1996-04-23 |