Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D407096 | Tree top inspection video camera | — | 1999-03-23 |
| 5673338 | System for verification of unique items | Stuart Denenberg, Robert N. Petersen, John Ashley Densberger | 1997-09-30 |
| 5521984 | System for registration, identification and verification of items utilizing unique intrinsic features | Stuart Denenberg, Robert N. Petersen, John Ashley Densberger | 1996-05-28 |
| D370183 | Indoor chimes | — | 1996-05-28 |
| 5408553 | Optical power splitter for splitting high power light | Ronald E. English, Jr. | 1995-04-18 |
| 5072208 | Electromechanical chaotic chiming mechanism | — | 1991-12-10 |