Welding helmet

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

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Patent

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D03082660

REFERENCES:
patent: D240970 (1976-08-01), Barta
patent: D249827 (1978-10-01), Rieppel et al.
patent: D267207 (1982-12-01), Hilton
patent: 2056027 (1936-09-01), Tracey
patent: 2384765 (1945-09-01), O'Reilly

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