Click to skip top of page links USPTO IntranetIntranet HomeIndexResourcesContactsInternetSearch
Patent Intranet > Classification Home Page > Classification Search Page > Classification Schedule with Indent Level
Site Feedback
 
   Search Classification Data | Class Numbers & Titles | Class Numbers | USPC Index  | International  | HELP  | Employee by Name  | Employees by Org       

 Class   380CRYPTOGRAPHY
  Click here to view a PDF version of this file
  1           CRYPTANALYSIS
  2           EQUIPMENT TEST OR MALFUNCTION INDICATION
  200           VIDEO CRYPTOGRAPHY
  201           . (1 indent ) Copy protection or prevention
  202           .. (2 indent ) Having origin or program ID
  203           .. (2 indent ) Having copy protect signal
  204           .. (2 indent ) Modifying sync signal
  205           . (1 indent ) Video electric signal masking
  206           .. (2 indent ) Masking of synchronization signal
  207           .. (2 indent ) Including locally generated masking signal
  208           .. (2 indent ) Including filter for removing masking signal
  209           .. (2 indent ) Masking signal selectively addressed
  210           . (1 indent ) Video electric signal modification (e.g., scrambling)
  211           .. (2 indent ) Interactive TV
  212           .. (2 indent ) Plural video stream multiplexing
  213           .. (2 indent ) Chrominance scrambling
  214           .. (2 indent ) Nonstandard scan pattern of video information
  215           ... (3 indent ) Line cut and shuffle
  216           .. (2 indent ) Image data converted to digital before modification
  217           ... (3 indent ) Having compression (e.g., MPEG)
  218           .. (2 indent ) Variable time delay modulation of baseband video signal
  219           .. (2 indent ) Carrier phase shift
  220           .. (2 indent ) Carrier frequency conversion
  221           .. (2 indent ) By modifying synchronizing signal
  222           ... (3 indent ) Including phase inversion of scan line information
  223           ... (3 indent ) Key signal on separate carrier
  224           ... (3 indent ) Including pseudo-synchronizing pulse
  225           ... (3 indent ) Self-synchronizing circuit at receiver
  226           ... (3 indent ) Key signal in blanking interval
  227           .. (2 indent ) Record or coin controlled
  228           ... (3 indent ) Including key on record
  229           ... (3 indent ) Including authentication
  230           ... (3 indent ) Including usage recording
  231           .. (2 indent ) Usage or charge determination
  232           ... (3 indent ) Including authentication
  233           ... (3 indent ) Including usage or charge recording at subscriber station
  234           ... (3 indent ) Including display of supplemental information
  235           .. (2 indent ) Phase inversion of scan line information
  236           .. (2 indent ) Modifying accompanying audio signal
  237           ... (3 indent ) Including digital audio
  238           ... (3 indent ) Including frequency modification of audio signal or frequency shifting of audio carrier
  239           .. (2 indent ) Encrypted code control signal
  240           .. (2 indent ) Including addressed decoder control signal
  241           ... (3 indent ) Having program ID or authorization
  242           ... (3 indent ) Having command signal for receiver
  243           FACSIMILE CRYPTOGRAPHY
  244           . (1 indent ) Synchronization
  245           . (1 indent ) Nonstandard scan pattern
  246           . (1 indent ) Including generation of an associated coded record
  247           CELLULAR TELEPHONE CRYPTOGRAPHIC AUTHENTICATION
  248           . (1 indent ) Visiting center
  249           . (1 indent ) Initialization
  250           . (1 indent ) Usage pattern detection
  251           ELECTRONIC GAME USING CRYPTOGRAPHY
  252           ELECTRIC SIGNAL MASKING
  253           . (1 indent ) By signal having discrete frequency component
  254           . (1 indent ) By signal having discrete step amplitude variation
  255           COMMUNICATION SYSTEM USING CRYPTOGRAPHY
  256           . (1 indent ) Fiber optic network
  257           . (1 indent ) Circuit switched network (e.g., wired telephone)
  41           .. (2 indent ) Having quantizing and subsequent normalizing of signal (e.g., reentry telephone circuitry)
  258           . (1 indent ) Position dependent or authenticating
  259           . (1 indent ) Symmetric key cryptography
  260           .. (2 indent ) Symmetric key synchronization
  261           ... (3 indent ) Including frame synchronization
  262           ... (3 indent ) Transmitting a seed, sequence, or initial value
  263           ... (3 indent ) Nonlinear or chaotic system
  264           .. (2 indent ) Key derived from addressable memory element
  265           .. (2 indent ) Combining outputs of shift register
  266           .. (2 indent ) Including a modem
  267           . (1 indent ) Correcting for random appearance of control character code
  268           . (1 indent ) Pseudo-random sequence scrambling
  269           . (1 indent ) Having compression
  270           . (1 indent ) Wireless communication
  271           .. (2 indent ) Having receiver selection (e.g., pager)
  272           .. (2 indent ) Including hand-off based cryptographic alteration
  273           .. (2 indent ) Rekeying system
  31           .. (2 indent ) Plural modulation of single carrier
  32           ... (3 indent ) Wobbling of carrier
  33           .. (2 indent ) Using plural paths or channels
  34           ... (3 indent ) Plural carrier frequencies
  274           .. (2 indent ) Synchronization
  35           . (1 indent ) Variable time delay modulation
  36           . (1 indent ) Time segment interchange
  37           .. (2 indent ) Block/data stream enciphering
  38           . (1 indent ) Frequency shift or inversion
  39           .. (2 indent ) Having plural band pass filters
  40           . (1 indent ) Having plural band pass filters
  42           . (1 indent ) Data stream/substitution enciphering
  43           .. (2 indent ) Key sequence signal combined with data signal
  275           . (1 indent ) Speech scrambler detail
  276           .. (2 indent ) Including sampling
  277           KEY MANAGEMENT
  278           . (1 indent ) Key distribution
  279           .. (2 indent ) Key distribution center
  280           ... (3 indent ) Control vector or tag
  281           ... (3 indent ) Using master key (e.g., key-encrypting-key)
  282           ... (3 indent ) By public key method
  283           .. (2 indent ) User-to-user key distributed over data link (i.e., no center)
  284           ... (3 indent ) Using master key (e.g., key-encrypting-key)
  285           ... (3 indent ) By public key method
  286           . (1 indent ) Key escrow or recovery
  44           . (1 indent ) Having particular key generator
  45           .. (2 indent ) Multiple key level
  46           .. (2 indent ) Nonlinear (e.g., pseudorandom)
  47           .. (2 indent ) Plural generators
  28           PARTICULAR ALGORITHMIC FUNCTION ENCODING
  29           . (1 indent ) NBS/DES algorithm
  30           . (1 indent ) Public key
  287           ELECTRIC SIGNAL MODIFICATION
  22           . (1 indent ) Having magnetic record carrier (e.g., tape, drum)
  26           . (1 indent ) Having mechanical control of signal encryption (e.g., cam)
  27           .. (2 indent ) By perforated record
  51           . (1 indent ) Having production of printed copy (e.g., printer, typewriter)
  52           . (1 indent ) Including particular structure or housing (e.g., display, keyboard)
  53           .. (2 indent ) Audio transducer mounting or structure
  54           BY MODIFYING OPTICAL IMAGE (E.G., TRANSMISSIVE OVERLAY)
  55           HAVING PRODUCTION OF PRINTED COPY (E.G., CRYPTOGRAPHIC PRINTER OR TYPEWRITER)
  56           SELECTIVELY MOVABLE ELEMENT HAVING CODE CHARACTERS
  57           . (1 indent ) Rotatable
  58           .. (2 indent ) Characters on peripheral surface (e.g., cylinder section)
  59           MISCELLANEOUS
 
 FOREIGN ART COLLECTIONS
 
  FOR000           CLASS-RELATED FOREIGN DOCUMENTS
 Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
 
  FOR103           STORED INFORMATION ACCESS OR COPY PREVENTION (380/3)
  FOR104           . (1 indent ) Digital data (e.g., software program protection, data encryption) (380/4)
  FOR105           . (1 indent ) Video (380/5)
  FOR106           ELECTRIC SIGNAL MASKING (380/6)
  FOR107           . (1 indent ) Video (380/7)
  FOR108           . (1 indent ) By signal having discrete step amplitude variation (380/8)
  FOR109           ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) (380/9)
  FOR110           . (1 indent ) Video (380/10)
  FOR111           .. (2 indent ) Variable time delay modulation of baseband video signal (380/11)
  FOR112           .. (2 indent ) Carrier phase shift (380/12)
  FOR113           .. (2 indent ) Carrier frequency conversion (380/13)
  FOR114           .. (2 indent ) Nonstandard scan of video information (380/14)
  FOR115           .. (2 indent ) By modifying synchronizing signal (380/15)
  FOR116           .. (2 indent ) Record or coin controlled (380/16)
  FOR117           .. (2 indent ) Phase inversion of scan line information (380/17)
  FOR118           .. (2 indent ) Facsimile (380/18)
  FOR119           .. (2 indent ) Encrypting of accompanying audio signal (380/19)
  FOR120           .. (2 indent ) Control coding (380/20)
  FOR121           . (1 indent ) Having transmission or distribution of key signal (380/21)
  FOR148           . (1 indent ) Having particular synchronization or initiation (380/48)
  FOR149           . (1 indent ) Having digital signal handling (e.g., digital control, digital computer communication) (380/49)
  FOR150           .. (2 indent ) Including shift register or memory (380/50)


   Note: Some content linked to on this page may require a plug-in for Adobe Acrobat Reader.

This file produced by USPTO - SIRA - Office of Classification Support - ReferenceTools Project. Questions or comments relating to this file should be directed to Patent Automation Feedback.

Click to skip end of page links


Intranet Home | Index | Resources | Contacts | Internet | Search | Firewall | Web Services

This data is current as of December/2011