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GB114495A
|
|
Improvements in or relating to Telegraph Systems.
|
|
GB114467A
|
|
Improvements in or relating to Telegraph Systems.
|
|
GB191116554A
|
|
Improvements in or relating to the Manufacture of Electrical Condensers and similar Apparatus.
|
|
GB190813191A
|
|
Improvements in or relating to Electric Telegraphy.
|
|
GB190622715A
|
|
Improvements in or relating to Electric Condensers or the like.
|
|
US895978A
|
|
Apparatus for transmitting and reproducing sounds.
|
|
GB190408054A
|
|
Improvements relating to Apparatus for Transmitting and Reproducing Sounds.
|
|
CA78275A
|
|
Electric telegraph apparatus
|
|
GB189924450A
|
|
Improvements in Electric Telegraph Apparatus.
|
|
GB189726333A
|
|
Improvements in and relating to Telegraphic Receiving Apparatus.
|
|
GB189518726A
|
|
Improvements in Electric Cables.
|
|
GB189509167A
|
|
Improvements relating to Telegraphic Working Through Cable Lines.
|
|
GB189408823A
|
|
Improvements relating to the Transmission of Signals through Telegraph Lines and Cables.
|
|
US942620A
|
|
Electric telegraphy.
|
