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GB539745A
|
|
Improvements in or relating to electric calculator equipment
|
|
GB521760A
|
|
Improvements in or relating to electrically operated indicating devices
|
|
GB517993A
|
|
Improvements in or relating to identification of subscribers in telecommunication exchange systems
|
|
GB484658A
|
|
Improvements in or relating to telephone or like systems
|
|
GB484475A
|
|
Improvements in or relating to date indicators and/or recorders
|
|
GB464431A
|
|
Improvements in or relating to automatic or semi-automatic telephone systems
|
|
GB464109A
|
|
Improvements in or relating to electric signalling systems
|
|
GB463063A
|
|
Improvements in or relating to alternating current signalling systems
|
|
GB440348A
|
|
Improvements in or relating to call-recording arrangements in telephone or like systems
|
|
GB406736A
|
|
Improvements in or relating to marine engine power transmissions
|
|
GB359542A
|
|
Improvements in or relating to the control of automatic selector switches for telephone or other remotely controlled systems
|
|
GB357091A
|
|
Improvements in or relating to automatic or semi-automatic telephone systems
|
|
GB356272A
|
|
Improvements in or relating to hunting switches particularly for use in automatic orsemi-automatic telephone systems
|
|
GB352096A
|
|
Improvements in or relating to automatic or semi-automatic telephone exchange systems
|
|
GB349973A
|
|
Improvements in or relating to time controlling circuits for telephone or like systems
|
|
GB346714A
|
|
Improvements in or relating to automatic or semi-automatic telephone exchange systems
|
|
GB343460A
|
|
Improvements in or relating to automatic or semi-automatic telephone exchange systems
|
|
GB331223A
|
|
Improvements in or relating to automatic or semi-automatic telephone systems
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