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GB1082068A
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Improvements in or relating to static electric inverters and converters
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Improvements in and relating to static switching apparatus
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Improvements in or relating to ignitron control circuits
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Improvements in or relating to apparatus for measuring the length of moving objects
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Improvements in or relating to apparatus operated by variations of capacitance
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Improvements in or relating to amplifiers
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Control of supply to an inductive load
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Improvements in apparatus for controlling the delivery of measured quantities of material
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A new or improved automatic position-controlling system
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Improvements in or relating to electromechanical signalling apparatus
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GB901685A
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Improvements in or relating to automatic control systems
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