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GB704777A
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Improvements in apparatus for the reception of television
|
|
GB635522A
|
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Improved means for showing the position of a rotary knob of an electric switch or other device
|
|
GB650489A
|
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Improvements in apparatus for the magnetic recording and reproducing of sound by means of a travelling tape or wire
|
|
GB644222A
|
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Improvements in electric transformers particularly for currents at audio frequencies
|
|
GB631543A
|
|
Improved disconnectible coupling means for pipes, rods, wires and the like
|
|
GB641897A
|
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Improvements in ribbon microphones
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|
GB619842A
|
|
Improved means for showing the position of a rotary knob of an electric switch or other device
|
|
GB611937A
|
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An improved gramophone pick-up
|
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GB588282A
|
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Improvements in the control of electric currents flowing for short periods as in welding
|
|
GB587104A
|
|
Improvements in the control of electric currents flowing for short periods as in welding
|
|
GB581220A
|
|
An improved radio-gramophone
|
|
GB581219A
|
|
Improvements in receptacles for sound recording discs
|
|
GB576349A
|
|
Improvements in gramophone pickups
|
|
GB566105A
|
|
Apparatus for testing resistors
|
|
GB552179A
|
|
An improved carrier current communication system
|
|
GB551197A
|
|
An improved carrier current communication system
|
|
GB552819A
|
|
An improved carrier current communication system
|
|
GB551230A
|
|
An improved carrier current communication system
|
|
GB533072A
|
|
Improvements in radio receivers
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|
GB531416A
|
|
An improved system for controlling radio receivers
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