by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D3/28 - H03D3/32 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by means of sloping amplitude/frequency characteristic of tuned or reactive circuit

CPC: by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D3/28 - H03D3/32 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Demodulation of angle-modulated oscillations > by means of sloping amplitude/frequency characteristic of tuned or reactive circuit

CPC:

Demodulation of angle-, modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence) > by means of sloping amplitude/frequency characteristic of tuned or reactive circuit (H03D3/28 - H03D3/32 takes precedence)

Additional Content IPC

Modifications of demodulators to reduce effects of temperature variations By means of transit-time tubes By deflecting an electron beam in a discharge tube

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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