Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8610498 | Methods and apparatus for variable solid state-to-tube rectification in an amplifier | Paul Stevens, John Calvin Fields | 2013-12-17 |
| 8071871 | Electromechanical servo assisted drum | — | 2011-12-06 |
| D617827 | Guitar body | Daniel J. Wolper | 2010-06-15 |
| 7586029 | Guitar and strap for playing in a standing configuration | Frederick Joseph Poole, Paul Joseph Kitterman | 2009-09-08 |
| D594896 | Guitar body | Daniel J. Wolper | 2009-06-23 |
| 7469052 | Portable sound system, apparatus, and method | — | 2008-12-23 |
| D578563 | Guitar headstock | Daniel J. Wolper | 2008-10-14 |
| D572302 | Guitar headstock | — | 2008-07-01 |
| D561240 | Guitar hole | — | 2008-02-05 |
| D555191 | Guitar headstock | — | 2007-11-13 |
| 7177439 | Methods and apparatus for dissipating heat in a voice coil | Timothy Bryan Tardo | 2007-02-13 |
| 7145392 | Methods and apparatus for variable harmonic distortion | John Calvin Fields | 2006-12-05 |
| 7053714 | Methods and apparatus for switching between class A and A/B operation in a power amplifier | John Calvin Fields | 2006-05-30 |
| D516607 | Guitar body | John Caleb Dawson, Vernon Timothy Litchfield | 2006-03-07 |
| D512453 | Guitar headstock | John Caleb Dawson, Vernon Timothy Litchfield | 2005-12-06 |
| D388117 | Guitar peghead | Edward Van Halen, Jim DeCola | 1997-12-23 |
| 5119430 | Sound amplifier system | Jack C. Sondermeyer, James W. Brown, Ronald David Goss | 1992-06-02 |
| D300537 | Guitar head | Michael V. Powers | 1989-04-04 |
| D300538 | Guitar head | Michael V. Powers | 1989-04-04 |
| D286299 | Guitar body or similar article | — | 1986-10-21 |
| D284198 | Guitar body or similar article | — | 1986-06-10 |
| D283899 | Guitar body or similar article | — | 1986-05-20 |
| D282177 | Guitar body or similar article | — | 1986-01-14 |
| D282064 | Guitar body or similar article | — | 1986-01-07 |
| D281981 | Guitar body or similar article | — | 1985-12-31 |