Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873577 | Edge decomposition for the transmission of high resolution facsimile images | — | 1989-10-10 |
| 4870497 | Progressive transmission of high resolution two-tone facsimile images | Donald L. Duttweiler | 1989-09-26 |