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Class Information
Number: 178/64
Name: Telegraphy > Systems > Coil transformer
Description: Systems for transmitting messages by induced currents having an induction-coil or transformer, usually with its primary in a local circuit, with the transmitter and its secondary in the main line; also includes systems utilizing induction-coils or transformers between sections of the main line.










Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
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