CPC Subclass Not Allocatable
H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION
Description
H04K covers technologies for concealing communication content and deliberately disrupting electromagnetic signals. This includes encryption methods, steganography, spread spectrum techniques, and frequency hopping systems designed to prevent unauthorized signal interception or eavesdropping. The class also encompasses jamming devices and countermeasures that intentionally interfere with wireless or wired transmissions to deny communication access. Applications range from military and government secure communications to commercial privacy protection and anti-theft systems.
3 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04K 1/00 Secret communication
- H04K 2203/00 Jamming of communication; Countermeasures
- H04K 3/00 Jamming of communication; Counter-measures
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