Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4751517 | Two-dimensional ink droplet sensors for ink jet printers | Peter A. Crean | 1988-06-14 |
| 4577197 | Ink jet printer droplet height sensing control | Peter A. Crean, David Birnbaum, Frank J. Liptak, David W. Sewhuk | 1986-03-18 |