Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6722753 | Method and apparatus for checking compatibility of a replaceable printing component | Brian L. Helterline, Winthrop D. Childers, Michael L. Bullock | 2004-04-20 |
| 6488352 | Method and apparatus for checking compatibility of a replaceable printing component | Brian L. Helterline, Winthrop D. Childers, Michael L. Bullock | 2002-12-03 |
| 6267463 | Method and apparatus for transferring data between a printer and a replaceable printing component | Thomas B. Pritchard, David Lowe, Eric P. Ross | 2001-07-31 |
| 6264301 | Method and apparatus for identifying parameters in a replaceable printing component | Brian L. Helterline, Joseph H. Bauman | 2001-07-24 |