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US2853923A
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Combined apparatus for the reproduction of sound and simultaneous projection of pictures
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GB794438A
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Improvements in or relating to sound recording and reproducing apparatus
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GB776489A
|
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Improvements in or relating to the production of endless coiled magnetic recording tapes provided with a guide groove
|
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GB767918A
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Improvements in or relating to sound-carriers in the form of an endless tape recorded for mechanical reproduction
|
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GB768205A
|
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Improvements in or relating to playback apparatus for tape and disc recordings
|
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GB756131A
|
|
Improvements in and relating to sound recording and reproducing apparatus
|
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US2810574A
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Magazine for sound record bands
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US2817516A
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Sound tape container
|
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US2797101A
|
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Method and apparatus for manufacturing endless sound tapes
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US2817112A
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Device for sound recording
|
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US2738317A
|
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Method of producing stamping positives for mechanical pick up sound tapes
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US2341600A
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Case for sound films
|
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GB532028A
|
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Improved apparatus for cutting sound records on sound tapes
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GB532029A
|
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Improvements in recording sound on endless tapes
|
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GB530265A
|
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Improved process for the duplication of sound recording tapes
|
|
GB528764A
|
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Improved process and apparatus for the gavanoplastic multiplication of sound record bands
|
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GB528763A
|
|
Improvements in sound record bands
|
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US2255559A
|
|
Process for producing endless sound-recording tapes joined together in crossed fashion
|
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GB527557A
|
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Improvements in devices for joining film ends
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GB523851A
|
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Improvements in mechanical sound recording and reproduction
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