|
US2606611A
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Gravity motor clock
|
|
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|
|
Disk slide transparency projector
|
|
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|
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Self-examination device
|
|
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|
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Picture or film timer
|
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|
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View finder
|
|
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Sheet of drawing material
|
|
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Photographic apparatus
|
|
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|
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Art of making motion picture cartoons
|
|
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|
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Art of making motion picture cartoons
|
|
US2054414A
|
|
Art of making motion picture cartoons
|
|
US2050697A
|
|
Picture apparatus
|
|
US1941980A
|
|
Making of sound synchronized motion pictures
|
|
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|
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Tempo indicating motion picture film
|
|
US1909339A
|
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Sound synchronized animated drawing film and process of producing same
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