CPC Subgroup
H04M 1/02 Constructional features of telephone sets
Full Title
Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > Constructional features of telephone sets
17 direct subcodes
Child Classifications
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- H04M 1/03 Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
- H04M 1/04 Supports for telephone transmitters or receivers
- H04M 1/11 Supports for sets, e.g. incorporating armrests
- H04M 1/15 Protecting or guiding telephone cords
- H04M 1/17 Hygienic or sanitary devices on telephone equipment (for mouthpieces or earpieces H04R1/12)
- H04M 1/18 Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment (H04M1/19 takes precedence)
- H04M 1/19 Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor (circuit arrangements for preventing eavesdropping H04M1/68; telephone cabinets E04H1/14)
- H04M 1/20 Arrangements for preventing acoustic feed-back (H04M1/62 takes precedence)
- H04M 1/21 Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
- H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials
- H04M 1/23 Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof (by improving visibility H04M1/22)