Protective helmet with shock absorbing suspension
United States Patent 2879513
US Patent References:
Safety helmet
- - 2758305

Protective helmet with shock absorbing suspension
- - 2796609


Inventors:
Hornickel, Robert R.
Fisher, Joseph R.
Publication Date:
03/31/1959
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Assignee:
MINE SAFETY APPLIANCES CO
Primary Class:
2/414
International Classes:
A42B3/14; A42B3/04