Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5936221 | Smart card system and method for transferring value | Gary L. Sturm | 1999-08-10 |
| 4854143 | Bolt assembly and method | John F. Stewart | 1989-08-08 |
| 4802353 | Battery-powered door lock assembly and method | James Mullin | 1989-02-07 |
| D288245 | Power failure warning light | Keith M. Mullins | 1987-02-10 |
| 4575659 | Sensor timer for lamps | Donald E. Pezzolo, James W. Pfeiffer | 1986-03-11 |
| 4521843 | Programmable wall switch for controlling lighting times and loads | Donald E. Pezzolo, James W. Pfeiffer | 1985-06-04 |
| 4508943 | Wall command switch | James W. Pfeiffer | 1985-04-02 |