Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889787 | Low gain positive acting diazo oxide pre-press proofing system with polyvinyl ether and particulate slip agent in adhesive layer | — | 1989-12-26 |
| 4656114 | Presensitized color-proofing diazo resin sheet with acrylic thermal adhesive layer | Barbara M. Cederberg | 1987-04-07 |
| 4601532 | Narrow band light absorbing filter | Peter M. Koelsch | 1986-07-22 |
| 4571373 | Exposure latitude improvement in printing positive-acting color pre-press proofs | Peter M. Koelsch | 1986-02-18 |