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LICK ET DES BREVETS PARAMOUNT
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LICK ET DES BREVETS PARAMOUNT
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A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
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FR846571D1938-11-241938-11-24Perfectionnements aux masques de protection contre les gaz
ExpiredFR846571A
(fr)