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Class Information
Number: 380/57
Name: Cryptography > Selectively movable element having code characters > Rotatable
Description: Subject matter wherein adjacent movable character bearing surfaces have a circular motion component.










Sub-classes under this class:

Class Number Class Name Patents
380/58 Characters on peripheral surface (e.g., cylinder section) 9


Patents under this class:

Patent Number Title Of Patent Date Issued
8532289 Fast computation of a single coefficient in an inverse polynomial Sep. 10, 2013
8362875 Secure system for non-covert user authentication and identification Jan. 29, 2013
8264910 Cipher watch Sep. 11, 2012
8195957 Memory randomization for protection against side channel attacks Jun. 5, 2012
7715554 Prime number determining method May. 11, 2010
7506160 System and method for enhanced data security in office machine environment Mar. 17, 2009
6792528 Method and apparatus for securing data contents of a non-volatile memory device Sep. 14, 2004
6175625 Control circuits for electric coding machines Jan. 16, 2001
6130946 Cryptographs Oct. 10, 2000
6097812 Cryptographic system Aug. 1, 2000
5321755 Information-encrypting device and method Jun. 14, 1994
5046096 Windowed rotatable cover which reveals one indicia on one surface and a second indicia on a second surface corresponding to the first that encodes and decodes messages Sep. 3, 1991
4885779 Personal identification encryptor system with error-correcting code and method Dec. 5, 1989
4870683 Personal identification encryptor system and method Sep. 26, 1989
4829568 System for the printing and reading of encrypted messages May. 9, 1989
4473228 Three-dimensional combinatorial linkage Sep. 25, 1984
4415158 Puzzle Nov. 15, 1983
4401973 Cycle limiting means for an electromechanical decoder Aug. 30, 1983
4331845 Output switch assembly and operating mechanism May. 25, 1982
4154006 Coding and decoding machine May. 15, 1979











 
 
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