Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879671 | Digital measurement of relative displacement using stored correction address data | Heinz Rieder | 1989-11-07 |
| 4867568 | Optoelectronic measuring system | Rieder Heinz | 1989-09-19 |