Protective helmet

Details Protective helmet Protective helmet

A - Human Necessities

42

B

2/71

A42B 3/00 (2006.01)

Patent

CA 2034450

TITLE: PROTECTIVE HELMET INVENTOR W. H. VELKE ABSTRACT A device to improve a protective helmet, of substantial- ly spherical shape, by forming its shell to include a plurality of circular rises or depressions, resulting in an evenly corrugated shell wall with increased strength and impact resistance.

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