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US2122778A
|
|
Microphone boom
|
|
US2127110A
|
|
Acoustic device
|
|
US2098215A
|
|
Film driving apparatus
|
|
US2101918A
|
|
Mounting for light sensitive devices
|
|
US2142493A
|
|
Motion picture apparatus
|
|
US2136724A
|
|
Sound recording
|
|
US2112894A
|
|
Film motion filter
|
|
US2131280A
|
|
Adjustment for optical systems
|
|
US2113834A
|
|
Sound recording
|
|
US2131294A
|
|
Sound recording
|
|
US2125390A
|
|
Sound recording
|
|
US2086770A
|
|
System for sound reproduction
|
|
US2111807A
|
|
Multiple lamp mount
|
|
US2111806A
|
|
Unitary mount for sound heads
|
|
US2115001A
|
|
Sound reproduction
|
|
US2136873A
|
|
Sound reproduction
|
|
US2144749A
|
|
Sound reproduction
|
|
US2136723A
|
|
Sound recording and reproduction
|
|
US2106338A
|
|
Flywheel clutch mechanism
|
|
US2125273A
|
|
Polarizing and output circuit for photosensitive devices
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