Patent classifications
G
PHYSICS
Load children
G01
MEASURING; TESTING
Load children
G01R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
Load children
19/00
Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Load children Filter patents View analytics View as hierarchy
G01R19/175
Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
Filter patents View analytics View as hierarchy