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GB191308746A
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Improvements in and relating to Electro-pneumatic Systems and Apparatus for Railway Signalling and for Operating Points.
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GB191303446A
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An Improved Protective Device for the Circuits of Electric Motors.
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GB191125343A
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Improvements in and relating to Apparatus for Actuating and Locking Points or Switches on Railways.
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GB191125344A
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An Improved Pole Changer for Electric Motors for use in connection with Electrical Systems of Operating Railway Points and the like.
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GB191125345A
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Improvements in Electrically Actuated and Controlled Apparatus for Operating Railway Semaphore Signals.
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GB191102887A
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Improvements in and relating to Electrical Systems and Apparatus for Railway Signalling.
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GB190913831A
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Improvements in Electric Relays for Railway Signalling and other Apparatus.
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GB190913647A
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Improvements in and relating to Railway Signalling Apparatus.
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GB190414159A
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Improvements in Railway Signalling Systems and Apparatus therefor.
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