| Patents for G10C 9 - Methods or tools specially adapted for the manufacture or maintenance of musical instruments covered by this subclass (225) |
|---|
| 11/19/1991 | US5065660 Piano tuning system |
| 10/03/1990 | CN2063269U Wormwheel spanner for piano |
| 09/25/1990 | US4958550 Tuning method and apparatus for keyboard musical instrument |
| 06/06/1990 | CN1042789A Intelligent musical instrument tone-correction device and its tone-correction metlhod |
| 04/03/1990 | US4913614 Piano moving apparatus |
| 01/03/1990 | CN2050649U Computerized detector for quality of piano keys |
| 01/17/1989 | US4798005 Component piano string angle gauge |
| 12/27/1988 | US4793046 Method and apparatus for precision installation of piano hammers on piano actions |
| 12/14/1988 | EP0294717A2 Key force-distance ratio measuring device for keybord intruments |
| 08/31/1988 | CN88201099U Multifunction computerized tuning device |
| 05/25/1988 | CN87206952U Piano playing test device |
| 05/10/1988 | US4743039 Grand piano action cradle |
| 10/06/1987 | US4697494 Piano soundboard downbearing force simulator |
| 06/17/1986 | US4594932 Piano plate mounting structure for upright piano |
| 04/09/1985 | US4509399 Vibration damper for string musical instrument |
| 01/01/1985 | US4491334 Piano truck |
| 10/16/1984 | US4476770 Device for micro tuning pianos and other stringed instruments |
| 10/09/1984 | US4475714 Piano lift |
| 06/05/1984 | US4452122 Piano tuning mutes |
| 07/07/1981 | US4276805 Covering wire tightening device composite strings of pianos |
| 01/13/1981 | US4244268 Strike line adjuster |
| 04/17/1979 | US4150372 Humidity control system |
| 09/12/1978 | US4112808 Device for cleaning and revitalizing wound strings for musical instruments |
| 12/20/1977 | US4063674 Method of making a wound musical instrument string |
| 09/13/1977 | US4047461 Piano key button alignment tool |