Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12420052 | Vibration suppression apparatus | Abraham Alexander Dauhajre, Daniel P. Dauhajre | 2025-09-23 |
| 11581004 | Dynamic voice accentuation and reinforcement | Richard Pivnicka | 2023-02-14 |
| 11420013 | Vibration suppression apparatus | Abraham Alexander Dauhajre, Daniel P. Dauhajre | 2022-08-23 |
| 8975514 | Cable organization assemblies | Erik Groset, Justin Liu, Robin DeFay | 2015-03-10 |
| D684559 | Zippered headphone | Erik Groset, Justin Liu, Robin DeFay | 2013-06-18 |
| D684137 | Zippered headphone | Erik Groset, Justin Liu, Robin DeFay | 2013-06-11 |
| D684138 | Zippered headphone | Erik Groset, Justin Liu, Robin DeFay | 2013-06-11 |
| 8455758 | Cable organization assemblies | Erik Groset, Justin Liu, Robin DeFay | 2013-06-04 |
| D652407 | Zippered earphones | Erik Groset, Justin Liu, Robin DeFay | 2012-01-17 |
| 5313525 | Acoustic apparatus with secondary quarterwave resonator | — | 1994-05-17 |
| 4417103 | Stereo reproduction with gapless splicing of pitch altered waveforms | William G. Eppler, Jr., Irwin H. Kornfeld | 1983-11-22 |
| 4415772 | Gapless splicing of pitch altered waveforms | William G. Eppler, Jr., Irwin H. Kornfeld, Rex Nathanson | 1983-11-15 |
| 4406001 | Time compression/expansion with synchronized individual pitch correction of separate components | Irwin H. Kornfeld | 1983-09-20 |
| 4207963 | Loudspeaker system | — | 1980-06-17 |