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GB750040A
|
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Improvements in or relating to apparatus for transmitting and receiving telephonic and high frequency currents through concentric cables
|
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GB479911A
|
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Improvements in means of and apparatus for conducting telephony through long cables
|
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GB432967A
|
|
Improvements in means of and apparatus for conducting telephony through cables over long distances
|
|
US1942278A
|
|
Means of and apparatus for transmitting messages through submarine and other like cables
|
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US1717017A
|
|
Means of and apparatus for transmitting messages through submarine and like cables
|
|
GB272273A
|
|
Improvements in the working of submarine telegraph cables
|
|
US1730198A
|
|
Means for eliminating disturbances at the ends of submarine telegraph cables
|
|
GB245853A
|
|
Improvements in and connected with means for eliminating disturbances at the ends ofsubmarine telegraph cables
|
|
GB233124A
|
|
Improvements in means of and apparatus for transmitting messages through submarine and other like cables
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