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Information Technology
Class Information
Number:
380/20
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
323
380/243
Facsimile cryptography
136
380/247
Cellular telephone cryptographic authentication
350
380/251
Electronic game using cryptography
78
380/252
Electric signal masking
141
380/255
Communication system using cryptography
440
380/277
Key management
1,054
380/28
Particular algorithmic function encoding
1,123
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
166
Patents under this class:
Patent Number
Title Of Patent
Date Issued
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