METHOD OF TRANSMITTING SPEECH IN CIPHERED FORM AND ARRANGEMENT FOR CARRYING OUT THE METHOD
United States Patent 3504286
US Patent References:
Secrecy communication system
- - 2777897


Inventors:
Jacobaeus, Anton Christian
Publication Date:
03/31/1970
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Assignee:
ERICSSON TELEFON AB L M
Primary Class:
380/260
Other Classes:
375/242, 380/274, 380/276
International Classes:
H04K1/00; H04K1/04




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