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GB689873A
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Needle for pick-up head of talking-machine using records
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GB683260A
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Actuating device for a record-playing turntable
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Actuating device for recordplaying turntables
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ES194465A1
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A towing device of a turntable plate
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ES194165A1
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A towing device of a turntable plate
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GB690571A
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Driving device for a gramophone turntable
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GB672483A
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An improved device for adjusting the frequency of oscillatory electric circuits
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US2461441A
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Device for securing an element of an oscillating electric circuit to a support
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US2464716A
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Method of assembling variable condensers
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US2491873A
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Wireless receiver
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US2526610A
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Mechanical tuning adjuster
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