Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998058 | Apparatus including transmitter, receiver and display housings for locating corresponding points on opposite sides of a structure | Semor D. Tofte, Thomas K. Hiniker | 1991-03-05 |
| D310339 | Point location device | S. David Tofte | 1990-09-04 |