Retractable guitar pick
Retractable tail on a stringed instrument body
Retracting guitar pick holder
Retrofit guitar tremolo
Reversible carbide-tipped endpin
Reversible seat cup for percussion instrument
Reversible stringed instrument system
Reversing and preventing warpage in stringed musical instruments
Rib reinforced, integral guitar belly
Roller bridge saddle
Rotary damper
Rotary damper for generating damping force variable in dependenc
Rotating electrical stringed instrument