CPC Subgroup
H04N 9/87 Regeneration of colour television signals (H04N9/80 takes precedence)
Full Title
Details of colour television systems > Processing of colour television signals in connection with recording > Regeneration of colour television signals (H04N9/80 takes precedence)
8 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04N 9/873 for restoring the colour component sequence of the reproduced signal
- H04N 9/877 by assembling picture element blocks in an intermediate memory
- H04N 9/88 Signal drop-out compensation
- H04N 9/89 Time-base error compensation
- H04N 9/898 using frequency multiplication of the reproduced colour signal carrier with another auxiliary reproduced signal, e.g. a pilot signal carrier
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