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IPC 7
H04H-H04H00900

SECTION H – ELECTRICITY


H 04ELECTRIC COMMUNICATION TECHNIQUE


H 04 HBROADCAST COMMUNICATION (transmission in general H04B; multiplex communication H04J)


Note

 This subclass covers:

 distribution of entertainment or informative matter simultaneously to a number of receiving stations over transmission lines or over radio waves;

 recording of the use made of the broadcast service.



1/

00Broadcast distribution systems

1/

02.Wired systems

1/

04..using carrier waves

1/

06...having frequencies in two or more frequency bands, e.g. medium wave and VHF

1/

08...combined with telephone network over which the broadcast is continuously available (telephone systems in general H04M)

1/

10..using signals not modulated on a carrier

1/

12...not sharing the network with any other service

1/

14..combined with power distribution network


3/

00Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency


5/

00Stereophonic broadcast systems (multiplex systems in general H04J)


7/

00Studio equipment (for television H04N); Interconnection of studios (arrangements for producing a reverberation or echo sound G10K 15/08) [5]

7/

02.Mobile studios

7/

04.Monitoring programmes


9/

00Recording the use made of the broadcast service


  
 

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