7 sheets
Music & Sound
The Stratocaster tremolo, the Moog filter, the phonograph and the first electric guitar — music patents for studio walls.
Music & Sound
US 200,521Phonograph or Speaking Machine1878
Sheet PD-11
Phonograph or Speaking Machine
US 372,786Gramophone1887
Sheet PD-17
Gramophone
US 1,707,570Loud-speaker1929
Sheet PD-48
Loud-speaker
US 2,089,171Electrical stringed musical instrument1937
Sheet PD-56
Electrical stringed musical instrument
US 2,741,146Tremolo Device1956
Sheet PD-74
Tremolo Device
US 2,976,755Electromagnetic pickup for lute-type musical instrument1961
Sheet PD-77
Electromagnetic pickup for lute-type musical instrument
US 3,475,623Electronic Filter1969
Sheet PD-90
Electronic Filter