Combined breathing mask and container therefore

Equipment for safety – protection – and rescue – Fire extinguisher or casing therefor – Portable or hand held

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D29 7

Patent

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D02837420

REFERENCES:
patent: D167858 (1952-09-01), Russell
patent: D197451 (1964-02-01), Grimm
patent: D225582 (1972-12-01), King
patent: D250131 (1978-10-01), Lewis et al.
patent: D251622 (1979-04-01), Garrison et al.
patent: D975439 (1961-03-01), Bentley
patent: 2228502 (1941-01-01), Boothby

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