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US2266057A
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Electrostatic converter
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US2247783A
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Machine for the production of alternating energy from direct current sources
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GB447662A
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Improvements in or relating to capacity surfaces for electrostatic devices for the recording and reproduction of sound
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GB178133A
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Improvements in apparatus for reproducing sound
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GB177530A
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Improvements in electric glow discharge tubes
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GB175657A
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Amplifier connections for wireless telegraphy
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GB189982A
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Improvements in or relating to electrostatic telephones
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GB157435A
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Improvements in multiple stage amplifiers
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GB157706A
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Improvements in electric discharge tubes
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GB157770A
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Improvements in kinematographs with intermittent feed of the film
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GB157443A
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Improvements in apparatus for recording sound waves
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GB157733A
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Improvements in the connections of electric discharge vessels for amplifying electric currents and potentials
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GB157757A
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Electrically operated glow lamp for the reproduction of acousticelectric frequencies
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GB157748A
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Improvements in differential circuit couplings for modulating the amplitudes of highfrequency oscillations by means of sound oscillations
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GB168846A
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Improvements in differential circuit couplings for varying the amplitude of high frequency oscillations by means of low frequency oscillations
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GB157436A
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Apparatus for the intensification without distortion of sounds and tones, for the purposes of acoustic kinematography
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GB157751A
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Phonetic companion film for silent pictorial representations
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