Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6373925 | Telephone calling party announcement system and method | Paul E. Greenwell, David Borland | 2002-04-16 |
| D451546 | Game card ink marker | — | 2001-12-04 |
| 6272465 | Monolithic PC audio circuit | Larry D. Hewitt, Jeffrey M. Blumenthal, Geoffrey E. Brehmer, Glen W. Brown, Carlin D. Cabler +10 more | 2001-08-07 |
| 5796815 | Communications device with improved ring signal detection | Zheng Xie | 1998-08-18 |
| 5659466 | Monolithic PC audio circuit with enhanced digital wavetable audio synthesizer | David Norris, Jeffrey M. Blumenthal, Geoffrey E. Brehmer, Glen W. Brown, Carlin D. Cabler +10 more | 1997-08-19 |