Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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19/00
Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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G01R19/165
Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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G01R19/16533
characterised by the application
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G01R19/16538
in AC or DC supplies
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