Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5962837 | Versatile RF terminal scanner system | Douglas W. Main | 1999-10-05 |
| 5763867 | Versatile terminal for use in a radio frequency identification system | Douglas W. Main | 1998-06-09 |
| 5216233 | Versatile RF terminal-scanner system | Douglas W. Main | 1993-06-01 |