Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8093475 | Tuning device | — | 2012-01-10 |
| 7164073 | String support | — | 2007-01-16 |
| 7102065 | Tuning device | — | 2006-09-05 |
| 6608248 | Device for tuning a string of a musical instrument | — | 2003-08-19 |
| 6444886 | Musical instrument | Ronald R. Spercel | 2002-09-03 |
| 6023014 | Apparatus for changing the tension in a string of a musical instrument | — | 2000-02-08 |
| 5962797 | Musical instrument | Ronald R. Spercel | 1999-10-05 |
| 5728955 | Tuning device | — | 1998-03-17 |
| 5696336 | String support | — | 1997-12-09 |
| 5492044 | String support having a base with string support members and method | — | 1996-02-20 |
| 5438901 | String support for musical instrument | — | 1995-08-08 |
| 5394783 | String support and method | — | 1995-03-07 |
| 5045006 | Foot loop for a windsurfing board | Wolfgang Berndorfer | 1991-09-03 |