Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5471313 | Method and control system architecture for controlling tone reproduction in a printing device | Tracy E. Thieret, Michael A. Butler | 1995-11-28 |
| 5450165 | System for identifying areas in pre-existing image data as test patches for print quality measurement | — | 1995-09-12 |
| 5402214 | Toner concentration sensing system for an electrophotographic printer | — | 1995-03-28 |
| 5367361 | System and method for controlling voltages of elements in an electrostatic printing apparatus | — | 1994-11-22 |
| 4963990 | Continuous halftoning using quarternary pixel cells | John F. Knapp | 1990-10-16 |