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Patents
and Applications by Eric K. Pritchard |
| US Patent
# |
Issue Date |
Patent Title |
| 4,809,336 |
02/28/89 |
Semiconductor Amplifier with
Tube Amplifier Characteristics |
| 4,995,084 |
02/19/91 |
Semiconductor Emulation of Tube
Amplifiers |
| 5,133,014 |
07/21/92 |
Semiconductor Emulation of Tube
Amplifiers |
| 5,434,536 |
07/18/95 |
Semiconductor Emulation of
Vacuum Tubes |
| 5,636,284 |
06/03/97 |
Solid-State Emulation of Vacuum
Tube Audio Power Amplifiers |
| 5,734,725 |
03/31/98 |
Tube Emulator Amplifier System |
| 5,761,316 |
06/02/98 |
Variable and Reactive Audio
Power Amplifier |
| 5,761,317 |
06/02/98 |
Tube Amplifier Fat Emulation
Structure |
| 5,802,182 |
09/01/98 |
Audio Process Distortion |
| 5,805,713 |
09/08/98 |
Solid State Circuit for Emulating
Push-Pull Tube Amplifier |
| 5,848,165 |
12/08/98 |
Fat Sound Creation Means |
| 6,057,737 |
05/02/00 |
Non-Linear Asymmetrical Audio
Amplifiers |
| D430,144 |
08/29/00 |
Speaker Grill Depicting a Hat
and a Guitar |
| D429,236 |
08/08/00 |
Ornamental Design for Speaker
Cabinets Including an Amplifier |
| D432,582 |
10/24/00 |
PA Logo Design |
| 6,411,720 |
06/25/02 |
Speaker Systems with Lower Frequency
of Resonance |
| 6,631,195 |
10/07/03 |
Speaker Attenuation for Practicing
a Musical Instrument |
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| PCT Application |
Date |
Application Title |
| US88/01025 |
03/23/87 |
Semiconductor Emulation of Tube
Amplifiers Completed |
| US93/06031 |
06/24/93 |
Semiconductor Emulation of Vacuum
Tubes Pending in Canada, Japan |
| US97/02787 |
02/22/97 |
Fat Sound Creation Means Pending
in Australia, Canada, Europe (UK, France, Germany) |
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| Foreign Patents |
Country |
Patent Title |
| 0 307 465 |
UK |
Semiconductor Emulation of Tube
Amplifiers |
| 0 307 465 |
FR |
Semiconductor Emulation of Tube
Amplifiers |
| P 38 55 425.9 |
GR |
Semiconductor Emulation of Tube
Amplifiers |
| 2834167 |
JA |
Semiconductor Emulation of Tube
Amplifiers |
| 0 651 906 |
EP |
Semiconductor Emulation of Vacuum
Tubes |
| 651906 |
UK |
Semiconductor Emulation of Vacuum
Tubes |
| 651906 |
FR |
Semiconductor Emulation of Vacuum
Tubes |
| 69318025 |
GR |
Semiconductor Emulation of Vacuum
Tubes |
| 651906 |
SW |
Semiconductor Emulation of Vacuum
Tubes |
| 718748 |
AU |
Fat Sound Creation Means |
| 2245525 |
CA |
Fat Sound Creation Means |
| 97506736 |
EU |
Fat Sound Creation Means |
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