Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638119 | Position indicating apparatus for use in a digitizing tablet system | Thomas C. Prentice | 1987-01-20 |
| 4582955 | Digitizing tablet system including a tablet having a grid structure made of two orthogonal sets of parallel uniformly sized and spaced U shaped loops of conductive material | — | 1986-04-15 |
| 4577057 | Digitizing tablet system having stylus tilt correction | — | 1986-03-18 |
| 4375081 | Multistage digital filtering utilizing several criteria | — | 1983-02-22 |
| 4181820 | Electric reverberation apparatus | Karl O. Bader | 1980-01-01 |