Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5233357 | Surveying system including an electro-optic total station and a portable receiving apparatus comprising a satellite position-measuring system | Erwin A. Frei, Rene Scherrer | 1993-08-03 |
| 5077557 | Surveying instrument with receiver for satellite position-measuring system and method of operation | — | 1991-12-31 |