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GB401059A
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Improvements in or relating to cells showing the kerr effect
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GB244360A
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Improvements in apparatus for producing a photographic record of light variations corresponding to sound waves
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GB258940A
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Improvements in or relating to apparatus for taking, printing or reproducing film records
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GB251307A
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Improvements in or relating to lamps for use in producing photographic records of electrical variations
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GB238333A
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Improvements in or relating to reproducing amplifiers for sound or like waves
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GB237332A
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Improvements in apparatus for reproducing sound from a photographic record
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GB227173A
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Improvements in and relating to apparatus for converting sound waves into variationsof electric current
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GB220041A
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Improvements in apparatus for electrically translating sound waves into light waves,and for producing a photographic record of such waves
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GB220040A
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Improvements in apparatus for electrically translating sound waves into light waves,and for producing a photographic record of such waves
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GB220042A
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Improvements in apparatus for electrically translating sound waves into light waves,and for producing a photographic record of such waves
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GB210604A
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Improvements in and relating to light reactive cells
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GB209818A
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An improved photo-electric device
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GB145168A
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Method of and apparatus for producing a flame
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GB145169A
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Method of and apparatus for the transmission of sound waves by means of light and like radiant energy
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