Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values

Introduced: January 1980

Last revised: January 2006

Full Title

Arrangements for measuring currents or voltages or for indicating presence or sign thereof > Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES

Related Keywords

SORTING of electric pulses

1 direct subcode

Child Classifications

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G01R 19/17 giving an indication of the number of times this occurs

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