Safety helmet
United States Patent 3286275
US Patent References:
/1080690.html
- - 1080690

Pneumatic suspension for safety helmet
- - 2759186

Armor material
- - 2768919

Protective helmet
- - 3039108

Protective helmet with removable suspension
- - 3055011


Inventors:
Marchello, John L.
Publication Date:
11/22/1966
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Assignee:
American, Safety Equip
Primary Class:
2/411
Other Classes:
D29/104
International Classes:
A42B1/08; A42B3/00; A42B3/06; A42B1/04; A42B3/04
US Patent References:
3116490Safety helmet having a semi-flexible liner
3137859Safety helmet head suspension
Foreign References:
GB717121A