Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944826 | Method and apparatus for preparing a screen printing screen | Peter M. Zollman, Andrew Birch | 1990-07-31 |
| 4878127 | Laser engraving machine for preparing rotary screen printing screens | Peter M. Zollman, Andrew Birch | 1989-10-31 |