| H | SK | ELECTRICITY |
| H04 | KL | ELECTRIC COMMUNICATION TECHNIQUE |
| H04H | UKL | BROADCAST COMMUNICATION (transmission in general H04B; multiplex communication H04J) |
| H04H 1/00 | HGR | Broadcast distribution systems |
| H04H 1/02 | UGR1 | |
| H04H 1/04 | UGR2 | |
| H04H 1/06 | UGR3 | | . . . | having frequencies in two or more frequency bands, e.g. medium wave and VHF |
|
| H04H 1/08 | UGR3 | | . . . | combined with telephone network over which the broadcast is continuously available (telephone systems in general H04M) |
|
| H04H 1/10 | UGR2 | | . . | using signals not modulated on a carrier |
|
| H04H 1/12 | UGR3 | | . . . | not sharing the network with any other service |
|
| H04H 1/14 | UGR2 | | . . | combined with power distribution network |
|
| H04H 3/00 | HGR | Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency |
| H04H 5/00 | HGR | Stereophonic broadcast systems (multiplex systems in general H04J) |
| H04H 7/00 | HGR | Studio equipment (for television H04N); Interconnection of studios (arrangements for producing a reverberation or echo sound G10K 15/08) [5] |
| H04H 7/02 | UGR1 | |
| H04H 7/04 | UGR1 | |
| H04H 9/00 | HGR | Recording the use made of the broadcast service |