H04M 1/27 Devices whereby a plurality of signals may be stored simultaneously
Introduced: July 1974
Last revised: January 2006
Full Title
Substation equipment, e.g. for use by subscribers > Devices for calling a subscriber > Devices whereby a plurality of signals may be stored simultaneously
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION
Filing statistics
IPC H04M 1/27 belongs to the parent subclass H04M, which recorded 292,116 patent applications worldwide between 2013 and 2023. Annual filings declined from 26,112 in 2013 to 15,773 in 2023 (-40%), peaking at 34,745 applications in 2017. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).
Source: EPO PATSTAT, worldwide filings
2 direct subcodes
Child Classifications
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- H04M 1/272 with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
- H04M 1/274 with provision for storing more than one subscriber number at a time
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327