Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11952619 | Arrays with quality control tracers | Peyton Shieh, John M. Beierle, Michael Graige, Alexander Fuhrmann, Wei Wei +1 more | 2024-04-09 |
| 10879855 | Configurable dual vacuum tube triode amplifier | — | 2020-12-29 |
| 9917560 | Incremental wattage reduction in a vacuum tube amplifier | — | 2018-03-13 |
| 8766082 | Amplifier with selectable master control | — | 2014-07-01 |
| D636374 | Guitar amplifier | — | 2011-04-19 |
| 7602927 | Guitar amplifier with channel-dedicated power switching | — | 2009-10-13 |
| 7571084 | System and method for morphable engineering criteria | David Warn, Richard R. Pawlicki | 2009-08-04 |
| 7519522 | System and method for morphable model design space definition | Richard R. Pawlicki, David Warn | 2009-04-14 |
| 7444195 | System and method for morphable model design space definition | Richard R. Pawlicki, David Warn | 2008-10-28 |
| 7440877 | System and method for morphable model design space definition | Richard R. Pawlicki, David Warn | 2008-10-21 |
| 7412064 | Presence control for guitar amplifier | — | 2008-08-12 |
| 7193458 | Power supply for guitar amplifier | — | 2007-03-20 |
| 7173488 | Vacuum tube power amplifier switchable between push-pull and single ended configurations | — | 2007-02-06 |
| 6724897 | Amplifier with alternate output level | — | 2004-04-20 |
| 6621907 | Mute circuit for use with switching relays | — | 2003-09-16 |
| 6522752 | Parallel channel multi mode music amplifier | — | 2003-02-18 |
| 5793252 | Power amplifier with switchable voicing elements | — | 1998-08-11 |
| 5559469 | Vacuum tube amplifier with selectable power devices | — | 1996-09-24 |
| 5168438 | Selectable dual rectifier power supply for musical amplifier | — | 1992-12-01 |
| 5091700 | Amplifier with mains voltage reduction | — | 1992-02-25 |
| 4713624 | Power amplifier with modified dynamic response | — | 1987-12-15 |
| 4701957 | Dual mode music instrument preamplifier | — | 1987-10-20 |
| 4593251 | Power amplifier capable of simultaneous operation in two classes | — | 1986-06-03 |
| 4532476 | Power amplifier capable of simultaneous operation in two classes | — | 1985-07-30 |
| 4257110 | Recognition memory with multiwrite and masking | Sydney M. Lamb | 1981-03-17 |