Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997588 | Cleaner for lithographic printing plates free of aromatic hydrocarbons | — | 1991-03-05 |
| 4886553 | Cleaner for lithographic printing plates | — | 1989-12-12 |
| 4796042 | Printing plate processor having recirculating water wash reclamation | Carlton D. Mappin | 1989-01-03 |
| 4778616 | Scratch corrector for lithographic printing plates | — | 1988-10-18 |
| 4452674 | Electrolytes for electrochemically treated metal plates | John E. Walls, Stanley F. Wanat, William J. Rozell | 1984-06-05 |
| 4448647 | Electrochemically treated metal plates | John E. Walls, Stanley F. Wanat, William J. Rozell | 1984-05-15 |
| 4399021 | Novel electrolytes for electrochemically treated metal plates | John E. Walls, Stanley F. Wanat, William J. Rozell | 1983-08-16 |
| 4388156 | Aluminum electrolysis in non-aqueous monomeric organic acid | John E. Walls | 1983-06-14 |
| 4383897 | Electrochemically treated metal plates | John E. Walls, Stanley F. Wanat, William J. Rozell | 1983-05-17 |
| 4381226 | Electrochemical treatment of aluminum in non-aqueous polymeric polybasic organic acid containing electrolytes | John E. Walls | 1983-04-26 |
| 4213887 | Lithographic plate finisher | John E. Walls | 1980-07-22 |