Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4670295 | Method for making a protective coating on a machine-readable marking | Robert L. Quinn, Philip M. Heyman | 1987-06-02 |
| 4600630 | Method for making a protective coating on a machine-readable marking and the product thereof | Robert L. Quinn, Philip M. Heyman | 1986-07-15 |
| 4339528 | Etching method using a hardened PVA stencil | — | 1982-07-13 |
| 4339529 | Etching method using a PVA stencil containing N-methylol acrylamide | — | 1982-07-13 |
| 4259421 | Improving etch-resistance of casein-based photoresist pattern | — | 1981-03-31 |
| 4211563 | Aqueous photoresist of casein and N-methylol acrylamide | — | 1980-07-08 |