Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5112453 | Method and apparatus for producing etched plates for graphic printing | Marion R. Behr | 1992-05-12 |
| 5102520 | Electrolytic etching process and apparatus | Marion R. Behr | 1992-04-07 |