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GB191405583A
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A New Method of Making Electrostatic Condensers.
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Improvements in and relating to the Treatment of Smoke and like Particles in Air or Gases.
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A Centrifugal Mercury Vacuum or Air Pump.
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Improvements in Gyroscopic Apparatus.
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Improvements in and relating to Gyrostatic Apparatus.
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Method of hermetically sealing electrical conductors through or into hard vitreous substances.
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GB191101880A
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An Improved Method of Hermetically Sealing Electrical Conductors Through or Into Hard Vitreous Substances.
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Electrical air heating apparatus
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Window condensation preventing apparatus
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CA313602A
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Heating and ventilating system
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