Multiplex telegraphy and telephony. Letter from the Secretary of Commerce submitting in response to Senate Resolution No. 149, a report concerning the discovery of multiplex telegraphy and telephony and the extent to which this system is now used. December 9, 1926. -- Referred to the Committee on Patents.
|Format:||Government Document Online Book|
[Washington, D.C.] :
[U.S. Government Printing Office],
|Series:||Senate document (United States. Congress. Senate) ;
69th Congress, no. 172. |
United States congressional serial set ; serial no. 8712.
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