|
US1845996A
|
|
Brake actuating mechanism
|
|
US1804570A
|
|
Brake actuating mechanism
|
|
US1706604A
|
|
Chromatic glissando keyboard and method of playing the same
|
|
US1845995A
|
|
Brake actuating mechanism
|
|
US1664041A
|
|
Pneumatic action
|
|
US1620481A
|
|
Combined radio and phonograph apparatus
|
|
US1450299A
|
|
Automatic stop for phonographs
|
|
US1358455A
|
|
Automatic piano-player action
|
|
US1327722A
|
|
Matrix for sound-records
|
|
US1293156A
|
|
Safety-valve.
|
|
US1330329A
|
|
Safety-valve
|
|
US1291061A
|
|
Spring-motor.
|
|
US1371636A
|
|
Musical instrument
|
|
US1218560A
|
|
Stop device for phonograph-disks.
|
|
US1186392A
|
|
Music-well-illuminating device.
|
|
US1189154A
|
|
Winding and rewinding mechanism.
|
|
US1238040A
|
|
Valve.
|
|
US1215297A
|
|
Automatic tracker attachment.
|
|
US1112989A
|
|
Silent-travel attachment for player-pianos.
|
|
US1138461A
|
|
Automatic tracker.
|
