CPC Class Codes
E04H 3/126
Foldable, retractable or ti...
G06F 15/16
Combinations of two or more...
H04L 12/1831
Tracking arrangements for l...
H04L 51/04
Real-time or near real-time...
H04L 51/10
Multimedia information
H04L 51/216
Handling conversation histo...
H04L 51/226
Delivery according to prior...
H04L 51/42
Mailbox-related aspects, e....
H04L 61/2503
Translation of Internet pro...
H04L 65/1083
In-session procedures
H04L 65/4015
where at least one of the a...
H04L 65/403
Arrangements for multi-part...
H04L 65/752
adapting media to network c...
H04L 65/764
at the destination reforma...
H04L 67/54
Presence management, e.g. m...
H04M 1/64
Automatic arrangements for ...
H04M 11/00
Telephonic communication sy...
H04M 3/53
Centralised arrangements fo...
H04M 3/5307
for recording messages comp...
H04N 7/147
Communication arrangements,...
H04N 7/15 :
Conference systems
H04W 4/12 :
Messaging; Mailboxes; Annou...
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