Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8472631 | Multi-channel audio enhancement system for use in recording playback and methods for providing same | Alan D. Kraemer | 2013-06-25 |
| 7778427 | Phase compensation techniques to adjust for speaker deficiencies | — | 2010-08-17 |
| 7636443 | Audio enhancement system | — | 2009-12-22 |
| 7555130 | Acoustic correction apparatus | Alan D. Kraemer | 2009-06-30 |
| 7492907 | Multi-channel audio enhancement system for use in recording and playback and methods for providing same | Alan Kraemer | 2009-02-17 |
| 7200236 | Multi-channel audio enhancement system for use in recording playback and methods for providing same | Alan D. Kraemer | 2007-04-03 |
| 7043031 | Acoustic correction apparatus | Alan D. Kraemer | 2006-05-09 |
| 6993480 | Voice intelligibility enhancement system | — | 2006-01-31 |
| 6718039 | Acoustic correction apparatus | Alan D. Kraemer | 2004-04-06 |
| 6597791 | Audio enhancement system | — | 2003-07-22 |
| 6285767 | Low-frequency audio enhancement system | — | 2001-09-04 |
| 6281749 | Sound enhancement system | Alan D. Kraemer | 2001-08-28 |
| D435842 | Speaker | — | 2001-01-02 |
| 5970152 | Audio enhancement system for use in a surround sound environment | — | 1999-10-19 |
| 5912976 | Multi-channel audio enhancement system for use in recording and playback and methods for providing same | Alan D. Kraemer | 1999-06-15 |
| D408818 | Speaker | — | 1999-04-27 |
| 5892830 | Stereo enhancement system | — | 1999-04-06 |
| 5850453 | Acoustic correction apparatus | Alan D. Kraemer | 1998-12-15 |
| 5784468 | Spatial enhancement speaker systems and methods for spatially enhanced sound reproduction | — | 1998-07-21 |
| 5661808 | Stereo enhancement system | — | 1997-08-26 |
| 5177329 | High efficiency low frequency speaker system | — | 1993-01-05 |
| 4866774 | Stero enhancement and directivity servo | — | 1989-09-12 |
| 4841572 | Stereo synthesizer | — | 1989-06-20 |
| 4836329 | Loudspeaker system with wide dispersion baffle | — | 1989-06-06 |
| 4819269 | Extended imaging split mode loudspeaker system | — | 1989-04-04 |