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G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R13/00—Arrangements for displaying electric variables or waveforms
G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records
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FR17555D1909-10-181913-03-25Appareil pour l'enregistrement photographique rapide des courbes d'oscillographes, de rhéographes, etc., ou analogues
ExpiredFR17555E
(fr)