Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8536906 | Direct drive waveform generator | Karl E. Sprentall | 2013-09-17 |
| 7791496 | Plug-in speaker for emergency notification and voice evacuation | Curtis R. Davidson, Bojana Vojinovic | 2010-09-07 |
| 7602308 | Plug-in alarm notification device | Curtis R. Davidson, Bojana Vojinovic | 2009-10-13 |
| D574283 | Alarm indicating output appliances | Curtis R. Davidson | 2008-08-05 |
| 7183483 | Cover for surface mounted alarm unit | Curtis R. Davidson, Bojana Vojinovic | 2007-02-27 |
| 6793375 | Reflector with complex parabolid surface for elongated light source | — | 2004-09-21 |
| 6766535 | Inflatable safety vest | John Duhamell, Robert J. Weygand, George Alvarez | 2004-07-27 |
| 6623143 | Ceiling reflectors | — | 2003-09-23 |
| 6127935 | Reversible speaker/strobe module | Curtis R. Davidson | 2000-10-03 |
| 5931569 | Reflector with strobe light extending therefrom | — | 1999-08-03 |
| 5914665 | Cover for surface mounted alarm unit | Edward J. Thorp, Curtis R. Davidson | 1999-06-22 |