Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4774840 | Detector for rod-like articles | — | 1988-10-04 |
| 4373188 | Cigarette weight monitoring system | John G. Dowding, Robert James Hudson | 1983-02-08 |
| 4306146 | High impedance transducer circuit | John R. Norman | 1981-12-15 |