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Class Information
Number: 380/32
Name: Cryptography > Communication system using cryptography > Wireless communication > Plural modulation of single carrier > Wobbling of carrier
Description: Subject matter which varies the frequency of an information modulated carrier signal periodically over a definite range.

Patents under this class:

Patent Number Title Of Patent Date Issued
8572411 Systems and methods for secure transaction management and electronic rights protection Oct. 29, 2013
7760792 Spread spectrum electromagnetic signals Jul. 20, 2010
7415043 Code division multiple access (CDMA) method and apparatus for protecting and authenticating wirelessly transmitted digital information Aug. 19, 2008
5742756 System and method of using smart cards to perform security-critical operations requiring user authorization Apr. 21, 1998
5164985 Passive universal communicator system Nov. 17, 1992
5040189 Multiple frequency radio system employing pulse repeaters Aug. 13, 1991
4649549 Apparatus for synchronizing linear PN sequences Mar. 10, 1987
4607375 Covert communication system Aug. 19, 1986
4606039 Spread spectrum coding method and apparatus Aug. 12, 1986
4581765 Information security system Apr. 8, 1986
4216500 Encoding and decoding system Aug. 5, 1980
3995115 Speech privacy system Nov. 30, 1976

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