Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Main Group
H04M 17/00

Prepayment telephone systems

Introduced: September 1968

Last revised: January 2024

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
TELEPHONIC COMMUNICATION

Filing statistics

IPC H04M 17/00 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

Additional Content

Limiting references

Preventing unauthorized calling from a telephone set by inserting a coded card

Application references

Accounting or billing specially adapted for wireless communication networks Usage measurements specially adapted for wireless communication networks

Related Keywords

telephone systems using PREPAYMENT

1 direct subcode

Child Classifications

Navigate with arrow keys, Enter to open

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327