IPC Subgroup
H03D 1/08 by means of non-linear two-pole elements
Introduced: September 1968
Last revised: January 2006
Full Title
Demodulation of amplitude-modulated oscillations > by means of non-linear two-pole elements
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
Additional Content
Homodyne or synchrodyne circuits Demodulation of amplitude-modulated oscillations by means of transit-time tubes Demodulation of amplitude-modulated oscillations by deflecting an electron beam in a discharge tube
1 direct subcode
Child Classifications
Navigate with arrow keys, Enter to open
- H03D 1/1 of diodes
Top Applicants
Top 10 applicants by patent filingsfor class H03, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158