Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5422461 | Control device and safety circuit for heating pads with PTC heater | John Weiss | 1995-06-06 |
| 5420397 | Control device and safety circuit for heating pads with PTC heater | John Weiss | 1995-05-30 |