Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5987380 | Hand-held GPS-mapping device | Gene Roe, Frank D. Defalco, William R. Michalson | 1999-11-16 |
| 5902347 | Hand-held GPS-mapping device | Gene Roe, Frank D. Defalco, William R. Michalson | 1999-05-11 |