CPC Main Group Additional Only
H04M 2201/00 Electronic components, circuits, software, systems or apparatus used in telephone systems
27 direct subcodes
Child Classifications
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- H04M 2201/02 Diodes
- H04M 2201/04 Transistors
- H04M 2201/06 Integrated circuits
- H04M 2201/08 Magnetic elements
- H04M 2201/10 Logic circuits
- H04M 2201/12 Counting circuits
- H04M 2201/14 Delay circuits; Timers
- H04M 2201/16 Sequence circuits
- H04M 2201/18 Comparators
- H04M 2201/20 Scanners
- H04M 2201/22 Synchronisation circuits
- H04M 2201/26 A/D convertors
- H04M 2201/28 S/P convertors
- H04M 2201/30 PCM
- H04M 2201/32 Personal computers
- H04M 2201/34 Microprocessors
- H04M 2201/36 Memories
- H04M 2201/38 Displays
- H04M 2201/39 using speech synthesis
- H04M 2201/40 using speech recognition