IPC Subgroup
G01R 13/22 Circuits therefor
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for displaying electric variables or waveforms > Cathode-ray oscilloscopes > Circuits therefor
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
Filing statistics
IPC G01R 13/22 belongs to the parent subclass G01R, which recorded 598,083 patent applications worldwide between 2013 and 2023. Annual filings grew from 34,721 in 2013 to 76,517 in 2023 (+120%). The most active applicants in class G01 are SGCC(STATE GRID CORPORATION OF CHINA) (41,447 applications), CHINESE ACADEMY OF SCIENCES (32,952 applications) and ROBERT BOSCH (16,470 applications).
Source: EPO PATSTAT, worldwide filings
Related Keywords
DEFLECTION -circuits for oscilloscopes
6 direct subcodes
Child Classifications
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- G01R 13/24 Time-base deflection circuits
- G01R 13/26 Circuits for controlling the intensity of the electron beam
- G01R 13/28 Circuits for simultaneous or sequential presentation of more than one variable
- G01R 13/3 Circuits for inserting reference markers, e.g. for timing, for calibrating, for frequency marking
- G01R 13/32 Circuits for displaying non-recurrent functions such as transients; Circuits for triggering; Circuits for synchronisation; Circuits for time-base expansion
- G01R 13/34 Circuits for representing a single waveform by sampling, e.g. for very high frequencies
Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 41,447
- CHINESE ACADEMY OF SCIENCES 32,952
- ROBERT BOSCH DE 16,470
- SAMSUNG ELECTRONICS COMPANY KR 10,052
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
- ZHEJIANG UNIVERSITY 9,529
- GUANGDONG POWER GRID CORPORATION 8,615
- TSINGHUA UNIVERSITY 7,805
- HALLIBURTON ENERGY SERVICES GROUP US 7,796
- QUALCOMM US 7,171