Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5138965 | Water level compensation device | — | 1992-08-18 |
| D275956 | Housing for portable data entry terminal | — | 1984-10-16 |
| 4471218 | Self-contained, portable data entry terminal | — | 1984-09-11 |
| 4326102 | Audio data transmission device with coupling device | Dale P. Mastell | 1982-04-20 |