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IPC Subgroup
G01R 23/177

Analysis of very low frequencies

Introduced: January 1980

Last revised: January 2006

Full Title

Arrangements for measuring frequencies; Arrangements for analysing frequency spectra > Spectrum analysis; Fourier analysis > Analysis of very low frequencies

Classification Context

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