Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7200208 | Method and system for providing communication services for hearing-impaired parties | William A. McClelland, Chris R. Heidelbauer | 2007-04-03 |
| 6542582 | Filtering signals in a conference call environment | — | 2003-04-01 |
| 6173045 | Electronic telephone book | — | 2001-01-09 |
| 4557197 | Pyrogen igniter | Ronald F. Vetter, George F. Sieg | 1985-12-10 |