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ATELIERS ROGER DE MAGONDEAUX E
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ATELIERS ROGER DE MAGONDEAUX E
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Publication of FR775528ApublicationCriticalpatent/FR775528A/fr
A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B23/00—Filters for breathing-protection purposes
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FR775528D1933-09-281933-09-28Perfectionnements apportés aux moyens de protection contre les poussières, les fumées, les brouillards et les gaz
ExpiredFR775528A
(fr)