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Phototube
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Improvements in and relating to electron discharge devices
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High-frequency oscillator
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High frequency apparatus
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Thermionic vacuum tube
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Regenerative system and method of operating the same
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Selective apparatus for signaling circuits
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Gaseous pulse amplifier
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Electron multiplier tube with a tapered collector and internal interelectrode decoupler
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Electron discharge device
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Electrical discharge device
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High-frequency relay employing an electron discharge device
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Circuit for the amplification and/or frequency-transformation of electrical oscillations of ultra high frequency
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Resonant cavity circuits
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Gaseous discharge tube
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Electron discharge device employing cavity resonators
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Amplifying device
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Electron discharge device
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Cold cathode vacuum tube and circuit
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Means for preventing retrcactive effects in audion amplifier circuits
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