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GB895112A
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Improvements in or relating to resonant cavities
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GB664538A
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Improvements relating to apparatus for scanning cinematograph films for the purpose of generating television signals or recording television pictures
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CA353465A
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Sound transmission system
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CA477249A
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Electric impulse generators
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CA462858A
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Electron lens system
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CA396194A
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Electronic oscillation generator
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CA399649A
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Cathode ray tube
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CA418695A
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Television system
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CA394267A
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Thermionic valve and circuit
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CA488539A
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Record playing mechanism
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CA418694A
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Electrical signal transmission apparatus
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CA403215A
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Television system
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CA397800A
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Aerial and feeder system
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CA399650A
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Electrical oscillation generator
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CA477248A
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Electrical pulse separating circuits
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CA396193A
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Electron discharge device
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CA347869A
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Sound transmission and reproduction system
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CA391360A
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Wireless receiver
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CA398131A
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Thermionic valve circuit
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CA425553A
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Electron multiplier
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