Fan for anti-dust helmet

Details Fan for anti-dust helmet Fan for anti-dust helmet

1977-01-07

1979-08-28

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D29 99, D2304

Patent

active

D02527677

REFERENCES:
patent: D214376 (1969-06-01), Sullivan
patent: D231615 (1974-05-01), Nygard et al.
patent: 3649964 (1972-03-01), Schoolz et al.
patent: 3963021 (1976-06-01), Bancroft

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