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FR818434A
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Improvements to machines for making assemblies of feet for electrical apparatus and to a method for making a closure for a tube end
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FR816763A
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Improvements to metal bulb electronic tubes and their manufacturing process
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GB489287A
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Improvements in and relating to the sealing of electric conductors into metal tubes
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GB445359A
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Improvements in or relating to thermionic devices
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GB396799A
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Electron discharge device
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FR731042A
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Electronic discharge device
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FR40472E
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Assembly of elements or electrodes for electronic devices
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GB385006A
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Electron discharge device
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GB380168A
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Improvements in and connected with light sensitive cells and the like
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FR718972A
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Improvements to photoelectric cells
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GB378408A
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Electrode assembly for electron discharge devices
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GB387665A
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Element assembly for electron devices
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FR716375A
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Assembly of elements or electrodes, for electronic devices
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FR712273A
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Multiple photoelectric cell
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FR712205A
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Photoelectric cell
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GB373230A
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Multiple light sensitive cell
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GB365838A
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Light-sensitive cell
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GB368388A
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Light sensitive cells
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FR707651A
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Improvements to electronic tubes
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FR706921A
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Improvements to thermionic tubes
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