Description
SECRET COMMUNICATION; JAMMING OF COMMUNICATION
SECRET COMMUNICATION; JAMMING OF COMMUNICATION
Subclass | Title |
---|---|
1/00 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) |
1/02 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) by adding a second signal to make the desired signal unintelligible |
1/04 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band |
1/06 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards |
1/08 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) by varying the polarisation of transmitted waves |
1/10 | Secret communication (ciphering or deciphering apparatus per se G09C ; systems with reduced bandwidth or suppressed carrier H04B 1/66 ; spread spectrum techniques H04B 1/69 ; by using a sub-carrier H04B 14/08 ; by multiplexing H04J ; transmission systems for secret digital information H04L 9/00 ; secret or subscription television systems H04N 7/16, H04N 21/00 ) by using two signals transmitted simultaneously or successively |
3/00 | Jamming of communication; Counter-measures (counter-measures used in radar or analogous systems G01S 7/00) |
Upgrade to the Professional Level to view Top Owners for this Class.Learn More |
---|