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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 |
| 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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