Patent Classification Explorer PCE

CPC Main Group

H04L 1/00

Arrangements for detecting or preventing errors in the information received

11 direct subcodes

Child Classifications

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H04L 1/0001
H04L 1/004
H04L 1/0078
H04L 1/02 by diversity reception
H04L 1/08 by repeating transmission, e.g. Verdan system
H04L 1/12 by using return channel
H04L 1/20 using signal quality detector
H04L 1/22 using redundant apparatus to increase reliability
H04L 1/24 Testing correct operation
H04L 2001/0092
H04L 2001/0098

Top Applicants

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

HUAWEI TECHNOLOGIES COMPANY CN 101,476
QUALCOMM US 101,139
SAMSUNG ELECTRONICS COMPANY KR 96,655
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
LG ELECTRONICS KR 55,253
HUAWEI TECHNOLOGIES COMPANY 54,181
SONY CORPORATION JP 35,309
ZTE CORPORATION CN 32,950
INTEL CORPORATION US 27,533
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498