Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864331 | Offset electrostatic imaging process | Alan H. Boyer, Graham D. Walter | 1989-09-05 |
| 4809026 | Electrostatic printing utilizing a heated air flow | Alan H. Boyer, Graham D. Walter | 1989-02-28 |
| 4809027 | Offset electrostatic printing utilizing a heated air flow | Alan H. Boyer, Graham D. Walter | 1989-02-28 |