Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5589821 | Distance determination and alarm system | Roy Sallen, Charles E. Sawabini | 1996-12-31 |
| 5272418 | Time enabled photosensing circuit | David J. Howe | 1993-12-21 |
| 5177461 | Warning light system for use with a smoke detector | William A. Johnson, David J. Howe | 1993-01-05 |
| 5154940 | Method for rapidly heating or cooking a food product | David J. Howe, William A. Johnson, Gregory J. McCabe | 1992-10-13 |
| 5055763 | Electronic battery charger device and method | William A. Johnson, Nicholas Joseph Smilanich, Chi-Thien Doan | 1991-10-08 |