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SERGE DE PROKOUDINE GORSKY
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SERGE DE PROKOUDINE GORSKY
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Publication of FR525914ApublicationCriticalpatent/FR525914A/fr
C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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FR525914A1918-11-091920-07-26Perfectionnements apportés aux appareils pour la photographie des couleurs, applicables à la cinématographie
ExpiredFR525914A
(fr)