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GB313478A
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Improvements in or relating to telephones
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GB254043A
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Improvements in or relating to automatic telephones
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GB235368A
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Improvements in or relating to electrical signalling systems or annunciators chiefly for hotels
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GB152063A
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Improvements in or relating to electric selective signalling and like systems
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GB136436A
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Improvements in or relating to Electric Selective Switching Apparatus.
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GB126755A
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Improvements in or relating to Electric Selective Switching Systems and Apparatus.
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GB110640A
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Improvements in or relating to Telephone Instruments.
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GB191516992A
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Improvements in or relating to Electrical Signalling Systems or Annunciators chiefly for Hotels.
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GB191516993A
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Improvements in or relating to Electric Switches.
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GB191517000A
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Improvements in or relating to Audible Signal Devices.
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GB191517002A
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Improvements in or relating to Displaying Stands or Supports for various Articles.
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GB191514232A
|
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Improvements in or relating to Portable Telephone and Telegraph Instruments.
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GB191514233A
|
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Improvements in or relating to Telephones.
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GB191509113A
|
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Improvements in or relating to Telephone Transmitters.
|
|
GB191505385A
|
|
Improvements in or relating to Intercommunication Telephone Systems.
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GB191503523A
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Improvements in or relating to Electric Signalling Systems particularly adaptable to Telephony.
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GB191503520A
|
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Improvements relating to Electric Signalling.
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GB191503366A
|
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Improvements relating to Telephone Exchanges.
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GB191414798A
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Improvements in or relating to Telephonic Transmitters and Receivers.
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GB191407557A
|
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Improvements in or relating to Cryptographic Typewriting Machines.
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