| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | Canada | 1 | |
| #4 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Control | |
| #3 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Shaffer John R | 10 |
| #2 | Bradley Craig | 4 |
| #3 | Gorry Jr Robert W | 1 |
| #4 | Pletzer Ken | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2010077306A1 | System and methods for synchronizing audio and/or visual playback with a fingering display for musical instrument | |
| US7173175B2 | Stringed instrument fingerboard for use with a light-system | |
| US5266735A | Music training instrument and method | |
| EP0596002A1 | Music training instrument and method. | |
| US4915005A | Fingering display for musical instrument | |
| US2300017A | Railway roadbed cleaner |