Arrangements for displaying electric variables or waveforms

Introduced: September 1968

IPC and CPC are identically structured here. All 7 subcodes exist in both systems.

Child Classifications

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G01R 13/02 for displaying measured electric variables in digital form +4 CPC IPC+CPC Available in IPC and CPC
G01R 13/04 for producing permanent records IPC+CPC Available in IPC and CPC
G01R 13/20 Cathode-ray oscilloscopes +4 CPC IPC+CPC Available in IPC and CPC
G01R 13/36 using length of glow discharge, e.g. glowlight oscilloscopes IPC+CPC Available in IPC and CPC
G01R 13/38 using the steady or oscillatory displacement of a light beam by an electromechanical measuring system IPC+CPC Available in IPC and CPC
G01R 13/40 using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect +2 CPC IPC+CPC Available in IPC and CPC
G01R 13/42 Instruments using length of spark discharge, e.g. by measuring maximum separation of electrodes to produce spark IPC+CPC Available in IPC and CPC