CPC Subgroup
H03H 11/04 Frequency selective two-port networks
Full Title
Networks using active elements > Multiple-port networks > Frequency selective two-port networks
13 direct subcodes
Child Classifications
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- H03H 11/06 comprising means for compensation of loss
- H03H 11/08 using gyrators
- H03H 11/10 using negative impedance converters (H03H11/08 takes precedence)
- H03H 11/12 using amplifiers with feedback ( , H03H11/08, H03H11/10 take precedence)
- H03H 11/14 using electro-optical devices
Top Applicants
Top 10 applicants by patent filingsfor class H03, 2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 7,293
- QUALCOMM US 7,085
- MURATA MANUFACTURING COMPANY JP 5,982
- HUAWEI TECHNOLOGIES COMPANY CN 4,641
- INTEL CORPORATION US 3,863
- TEXAS INSTRUMENTS US 3,409
- MURATA MANUFACTURING COMPANY 2,874
- SK HYNIX KR 2,644
- SKYWORKS SOLUTIONS US 2,545
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,437