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GB190913973A
|
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An Improved Street Fire Alarm Ambulance and Police Call Box.
|
|
GB190429627A
|
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Improvements in Electrical Fire Alarm or other Call Apparatus.
|
|
CA76265A
|
|
Electric call apparatus
|
|
GB190017846A
|
|
Improvements in Telephonic Apparatus.
|
|
GB190016308A
|
|
Improvements in Switch Boards applicable for Electric Call Apparatus.
|
|
GB189913462A
|
|
Improvements in and relating to Street Fire Alarms.
|
|
GB189624979A
|
|
An Instrument for Ascertaining Levels and Angles.
|
|
US663367A
|
|
Switchboard for telephonic or telegraphic purposes.
|
|
GB189608802A
|
|
Improvements in and relating to Switch Boards to be Used for Telephonic or Telegraphic Purposes.
|
|
GB189413082A
|
|
A Method of and Apparatus for Fixing or Erecting Telephonic, Telegraphic, or other Wires.
|
|
CA700623A
|
|
Safety ladder
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