Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D567232 | Push-to-talk communicator housing | Alexander L. Darbut, Ulrich Muzyk | 2008-04-22 |
| D438196 | Miniature microphone housing and switch | Alexander L. Darbut, Jean E. Daavettila | 2001-02-27 |
| 4764690 | Electret transducing | Preston V. Murphy | 1988-08-16 |
| 4331840 | Electret transducer with tapered acoustic chamber | Preston V. Murphy | 1982-05-25 |