|
US2566540A
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Latch operated positive clutch
|
|
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Sound film drive and guide
|
|
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Record strip magazine and mounting
|
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Indexing control means
|
|
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Support for sound record films
|
|
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Method of splicing organic plastic film
|
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Speed control for sound record medium
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Controlling device for sound record film
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Sound recording device
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Sound record film
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Indexing and finding means for sound recording and reproducing machines
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CA396682A
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Sound recording head
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CA399528A
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Recording stylus
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