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US1631570A
|
|
Motion-picture-film feed
|
|
US1631240A
|
|
Motion-picture screen
|
|
US1274661A
|
|
Means for translating wave impulses.
|
|
US1222348A
|
|
Electric telephone talking-machine.
|
|
US1225203A
|
|
Means for utilizing electrically-transmitted impulses.
|
|
US1236649A
|
|
Dead-beat balanced electrical transmitter.
|
|
US1176725A
|
|
Balanced electrical transmitter.
|
|
US1221408A
|
|
Means for reproducing vibrations.
|
|
US1221407A
|
|
Apparatus for producing companion auditory and visual records for simultaneous reproduction.
|
|
US1162433A
|
|
Combined phonographic and motion-picture apparatus for producing indexed synchronous records.
|
|
US1065576A
|
|
Combination apparatus for synchronizing motion and sound reproductions.
|
|
US1124580A
|
|
Method of and means for localizing sound reproduction.
|
|
US963677A
|
|
Hair-drying fan.
|
|
US1017840A
|
|
Therapeutic vibrator.
|
|
CA112016A
|
|
Gas making machine
|
|
US893771A
|
|
Bowed musical instrument.
|
|
US796279A
|
|
Gas-generator.
|
|
US768260A
|
|
Automatic brake and take-up device for trolley-cords.
|
|
CA81050A
|
|
Engine
|
|
CA30639A
|
|
Automatic scales for weighing cars and recording the weights
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