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GB626246A
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Improvements in or relating to methods of producing carbon resistors
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GB615257A
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Improvements in or relating to electron microscopes and other electronic apparatus employing electron lenses
|
|
GB609106A
|
|
Television camera
|
|
GB606147A
|
|
Improvements in or relating to electron discharge tubes
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|
GB596964A
|
|
Improvements in or relating to high vacuum diffusion or condensation pumps
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|
GB574798A
|
|
Apparatus for measuring medium and high vacua
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|
GB570672A
|
|
Improvements in or relating to cathode ray tubes
|
|
GB565063A
|
|
Improvements in or relating to the screening of amplifying valves
|
|
GB564546A
|
|
Improvements in or relating to cathode ray tubes
|
|
GB567971A
|
|
Improvements in or relating to the screening of amplifying valves
|
|
GB564601A
|
|
Improvements in or relating to electronic valves
|
|
GB579319A
|
|
Improvements in or relating to electron discharge devices
|
|
GB555478A
|
|
Improved amplifying valve for high frequencies
|
|
GB570834A
|
|
Improved arrangement for adjusting small clearances between electrodes in discharge tubes
|
|
GB553350A
|
|
Improvements in or relating to metal-to-glass seals of medium size
|
|
GB581323A
|
|
Improvements in or relating to amplifier valves for high frequencies of the grounded grid triode type
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|
GB575060A
|
|
Improvements in or relating to picture reproduction tubes especially for television
|
|
US2197753A
|
|
Multiple grid structure and method of producing the same
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|
US2227095A
|
|
Discharge tube
|
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US2147450A
|
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Apparatus for producing resistances
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