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Symbol IPC-Stellen auswählen Titel
A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
H
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ELECTRICITY
H01
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ELECTRIC ELEMENTS
H02
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GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H03
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ELECTRONIC CIRCUITRY
H04
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ELECTRIC COMMUNICATION TECHNIQUE
H04B
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TRANSMISSION [4]
H04H
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BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)
H04J
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MULTIPLEX COMMUNICATION (peculiar to transmission of digital information H04L 5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N 7/08; in exchanges H04Q 11/00)
H04K
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SECRET COMMUNICATIONJAMMING OF COMMUNICATION
H04L
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TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) [4]
H04L 1/00
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Arrangements for detecting or preventing errors in the information received [1, 2006.01]
H04L 5/00
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Arrangements affording multiple use of the transmission path [1, 2006.01]
H04L 7/00
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Arrangements for synchronising receiver with transmitter [1, 2006.01]
H04L 9/00
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Arrangements for secret or secure communicationsNetwork security protocols [1, 2006.01, 2022.01]
H04L 12/00
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Data switching networks (interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units G06F 13/00) [5, 2006.01]
H04L 13/00
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Details of the apparatus or circuits covered by groups H04L 15/00 or H04L 17/00 [1, 2006.01]
H04L 15/00
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Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code (teaching apparatus therefor G09B; telegraph tapping keys H01H 21/86) [1, 2006.01]
H04L 17/00
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Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code [1, 2006.01]
H04L 19/00
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Apparatus or local circuits for step-by-step systems [1, 2006.01]
H04L 21/00
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Apparatus or local circuits for mosaic printer telegraph systems [1, 2006.01]
H04L 23/00
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Apparatus or local circuits for telegraphic systems other than those covered by groups H04L 15/00-H04L 21/00 [1, 2006.01]
H04L 25/00
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Baseband systems [1, 2006.01]
H04L 27/00
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Modulated-carrier systems [1, 2006.01]
H04L 41/00
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Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks [2022.01]
H04L 43/00
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Arrangements for monitoring or testing data switching networks [2022.01]
H04L 45/00
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Routing or path finding of packets in data switching networks (routing or path finding in wireless networks H04W 40/00) [2022.01]
H04L 47/00
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Traffic control in data switching networks  (arrangements for detecting or preventing errors in the information received H04L 1/00) [2022.01]
H04L 49/00
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Packet switching elements [2022.01]
H04L 51/00
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User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail [2022.01]
H04L 61/00
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Network arrangements, protocols or services for addressing or naming [2022.01]
H04L 65/00
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Network arrangements, protocols or services for supporting real-time applications in data packet communication (real-time or near real-time messaging, e.g. instant messaging [IM] H04L 51/04; selective video distribution H04N 21/00) [2022.01]
H04L 65/10
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Architectures or entities [2022.01]
H04L 65/1016
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. . IP multimedia subsystem [IMS] [2022.01]
H04L 65/102
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. . Gateways (arrangements for connecting between networks having differing types of switching systems, e.g. gateways, H04L 12/66) [2022.01]
H04L 65/1023
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. . . Media gateways [2022.01]
H04L 65/1033
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. . . Signalling gateways [2022.01]
H04L 65/1043
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. . . Gateway controllers, e.g. media gateway control protocol [MGCP] controllers [2022.01]
H04L 65/1045
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. . Proxies, e.g. for session initiation protocol [SIP] [2022.01]
H04L 65/1046
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. . Call controllersCall servers [2022.01]
H04L 65/1053
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. . IP private branch exchange [PBX] functionality entities or arrangements (circuit switched PBXs H04M 3/00) [2022.01]
H04L 65/1055
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. . . Single-site [2022.01]
H04L 65/1056
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. . . Multi-site [2022.01]
H04L 65/1059
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. . End-user terminal functionalities specially adapted for real-time communication [2022.01]
H04L 65/1063
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. . Application servers providing network services (systems providing special services to telephonic subscribers H04M 3/42) [2022.01]
H04L 65/1066
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Session management [2022.01]
H04L 65/1069
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. . Session establishment or de-establishment [2022.01]
H04L 65/1073
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. . Registration or de-registration [2022.01]
H04L 65/1076
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. . Screening of IP real time communications, e.g. spam over Internet telephony [SPIT] [2022.01]
H04L 65/1083
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. . In-session procedures [2022.01]
H04L 65/1089
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. . . by adding mediaby removing media [2022.01]
H04L 65/1093
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. . . by adding participantsby removing participants [2022.01]
H04L 65/1094
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. . . Inter-user-equipment sessions transfer or sharing [2022.01]
H04L 65/1095
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. . . Inter-network session transfer or sharing [2022.01]
H04L 65/1096
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. . Supplementary features, e.g. call forwarding or call holding (systems providing special services or facilities to telephony subscribers H04M 3/42) [2022.01]
H04L 65/1101
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. . Session protocols [2022.01]
H04L 65/1104
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. . . Session initiation protocol [SIP] [2022.01]
H04L 65/1106
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. . . Call signalling protocolsH.323 and related [2022.01]
H04L 65/1108
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. . . Web based protocols, e.g. webRTC [2022.01]
H04L 65/40
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Support for services or applications [2022.01]
H04L 65/401
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. . wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference [2022.01]
H04L 65/402
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. . wherein the services involve a main real-time session and one or more additional parallel non-real time sessions, e.g. downloading a file in a parallel FTP session, initiating an email or combinational services [2022.01]
H04L 65/403
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. . Arrangements for multi-party communication, e.g. for conferences  (data switching systems for conference H04L 12/18;  arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M 3/56;  television conferencing systems H04N 7/15) [2022.01]
H04L 65/4038
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. . . with floor control [2022.01]
H04L 65/4053
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. . . without floor control [2022.01]
H04L 65/4061
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. . Push-to services, e.g. push-to-talk or push-to-video [2022.01]
H04L 65/60
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Network streaming of media packets [2022.01]
H04L 65/61
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. . for supporting one-way streaming services, e.g. Internet radio [2022.01]
H04L 65/611
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. . . for multicast or broadcast  (arrangements for broadcast or distribution combined with broadcast H04H 20/00;  arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H 60/00;  systems for broadcast or conference H04L 12/18; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W 4/06) [2022.01]
H04L 65/612
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. . . for unicast [2022.01]
H04L 65/613
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. . . for the control of the source by the destination (control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N 21/637) [2022.01]
H04L 65/65
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. . Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP] [2022.01]
H04L 65/70
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. . Media network packetisation [2022.01]
H04L 65/75
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. . Media network packet handling [2022.01]
H04L 65/752
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. . . adapting media to network capabilities [2022.01]
H04L 65/756
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. . . adapting media to device capabilities [2022.01]
H04L 65/80
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Responding to QoS [2022.01]
H04L 67/00
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Network arrangements or protocols for supporting network services or applications  (user-to-user messaging H04L 51/00;  network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L 65/00) [2022.01]
H04L 69/00
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Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass (networks security protocols H04L 9/40; wireless communication networks H04W) [2022.01]
H04L 101/00
Indexing scheme associated with group H04L 61/00 [2022.01]
H04L 101/00
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Indexing scheme associated with group H04L 61/00 [2022.01]
H04M
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TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
H04N
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PICTORIAL COMMUNICATION, e.g. TELEVISION [4]
H04Q
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SELECTING (switches, relays, selectors H01H;  wireless communication networks H04W) [1, 2009.01]
H04R
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LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERSDEAF-AID SETSPUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) [6]
H04S
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STEREOPHONIC SYSTEMS [3]
H04W
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WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M 1/72) [2009.01]
H05
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ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H10
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SEMICONDUCTOR DEVICESELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR [2023.01]
H99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

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