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Class Information
Number: 380/49
Name: Cryptography >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
380/1	Cryptanalysis	72
380/2	Equipment test or malfunction indication	137
380/200	Video cryptography	324
380/243	Facsimile cryptography	136
380/247	Cellular telephone cryptographic authentication	353
380/251	Electronic game using cryptography	79
380/252	Electric signal masking	141
380/255	Communication system using cryptography	443
380/277	Key management	1,056
380/28	Particular algorithmic function encoding	1,129
380/287	Electric signal modification	91
380/54	By modifying optical image (e.g., transmissive overlay)	392
380/55	Having production of printed copy (e.g., cryptographic printer or typewriter)	160
380/56	Selectively movable element having code characters	27
380/59	Miscellaneous	167