Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4736122 | Read head for Wiegand wire | John E. Opie, Carroll D. Sloan | 1988-04-05 |
| 4484090 | Pulse generator with shaped magnetic field | John E. Opie | 1984-11-20 |
| 4309628 | Pulse generation by changing magnetic field | — | 1982-01-05 |
| 4263523 | Pulse generator using read head with Wiegand wire | — | 1981-04-21 |
| 4247601 | Switchable magnetic device | — | 1981-01-27 |