Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6462868 | Display device for both hardcopy and digital images | Daniel J. Giesberg, David Irwin Lappen | 2002-10-08 |
| 5930351 | Remote telephone ringer controller | David Irwin Lappen | 1999-07-27 |
| 5812785 | Method and apparatus for monitoring video signals in a computer | David Irwin Lappen | 1998-09-22 |
| 5687096 | Method and apparatus for monitoring video signals in a computer | David Irwin Lappen | 1997-11-11 |
| 4956775 | Object sensor for detecting characteristics such as color for games | Reuben B. Klamer, David Irwin Lappen, Beatriz E. Pardo | 1990-09-11 |