H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04W
WIRELESS COMMUNICATION NETWORKS
H04W
WIRELESS COMMUNICATION NETWORKS
4/00
Services specially adapted for wireless communication networks; Facilities therefor
4/00
Services specially adapted for wireless communication networks; Facilities therefor
H04W4/24
Accounting or billing
H04W4/24
Accounting or billing