|
US2005154A
|
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Phonograph pick-up
|
|
GB358252A
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Improvements in and relating to wire-wound rheostats, potentiometers, variable inductances and the like
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GB352242A
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Improvements in supporting arms for electrical pick-up devices
|
|
GB360871A
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Improvements in and relating to sound reproducing devices
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Electromagnetic pick-up
|
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US1830801A
|
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Magnetic pick-up device
|
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Phonograph pick-up device
|
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Electric pick-up device
|
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GB261780A
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Improvements in electric vacuum cleaners
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Silencing vacuum cleaners
|
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Vacuum-cleaner device
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GB216969A
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Improvements in or relating to vacuum cleaning apparatus
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Vacuum cleaner
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US1573771A
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Vacuum cleaner
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