Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5424537 | Calibrated color scanner | Richard F. Lehman, Calvin M. Winey | 1995-06-13 |
| 5237172 | Calibrated color scanner with reference level adjustment | Richard F. Lehman, Calvin M. Winey | 1993-08-17 |
| 4772875 | Intrusion detection system | James F. Maddox, Mark B. Kadonoff, Robert W. George, II | 1988-09-20 |
| 4455487 | Fire detection system with IR and UV ratio detector | — | 1984-06-19 |
| 4228379 | Diaphragm type piezoelectric electroacoustic transducer | John K. Guscott, Gerard Renner | 1980-10-14 |