Protective face mask

Equipment for safety – protection – and rescue – Body restraint or protective covering – Face – mouth – or ear

Patent

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2902

Patent

active

D03844412

REFERENCES:
patent: D224282 (1972-07-01), Candela
patent: D238118 (1975-12-01), Rhee
patent: D238830 (1976-02-01), Rhee
patent: D288980 (1987-03-01), Pernicka
patent: D317063 (1991-05-01), Johnson
patent: 2616081 (1952-11-01), Weaver

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