Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5581052 | Pressure sensitive stylus having resiliently compressible tip element | David A. Siefer, Frank R. Chiappetta, Tomas Trousil | 1996-12-03 | $3,631,000 |
| RE34095 | Digitizer stylus with pressure transducer | Henry G. Matthews | 1992-10-13 | |
| 5111005 | Graphics tablet with N-dimensional capability | Paul D. Smith, Robert M. McDermott | 1992-05-05 | $433,000 |
| 5055831 | Cursor for digitizer tablet | — | 1991-10-08 | $294,000 |
| 4786764 | Digitizer stylus with pressure transducer | Henry G. Matthews | 1988-11-22 | $526,000 |