Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4920342 | Membrane switchcores with high resisitivity ink circuits | — | 1990-04-24 |
| 4876461 | Self-referencing capacitive key cell structure and switchcore matrices formed therefrom | — | 1989-10-24 |
| 4857684 | Capacitance membrane switchcore with intertrace capacitive coupling and/or intratrace capacitive coupling | — | 1989-08-15 |