Safety helmet

Apparel and haberdashery – Footwear – Athletic-type

Patent

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Patent

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D02774259

REFERENCES:
patent: D234411 (1975-03-01), Zuppert
patent: 2420522 (1947-05-01), Daly
patent: 3055012 (1962-09-01), Aileo
Wilson Cat. No. W6650 .COPYRGT.1967 p. 7; Wilson's "Jet Cap" Hard Hat; top of page.
New Equipment Digest Jan. 1978 p. 63; "Norton" Hard Hat top right of page.

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