| 7179975 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
2007-02-20 |
| 6870084 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
2005-03-22 |
| 6642442 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
2003-11-04 |
| 6359202 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed fretted musical instruments and making adjustments to the rule of 18 |
Gregory T. Back |
2002-03-19 |
| 6143966 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
2000-11-07 |
| 5955689 |
Method and apparatus for fully adjusting and providing tempered intonation for stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
1999-09-21 |
| 5814745 |
Method and apparatus for fully adjusting and intonating stringed, fretted musical instruments, and making adjustments to the rule of 18 |
Gregory T. Back |
1998-09-29 |
| 5728956 |
Method and apparatus for fully adjusting and intonating an acoustic guitar |
Gregory T. Back |
1998-03-17 |
| 5600079 |
Method and apparatus for fully adjusting and intonating an acoustic guitar |
Gregory T. Back |
1997-02-04 |
| 5404783 |
Method and apparatus for fully adjusting and intonating an acoustic guitar |
Gregory T. Back |
1995-04-11 |