Title:
Pneumatic helmet
United States Patent 2618780


Inventors:
Cushman, Cecil A.
Application Number:
US17517350A
Publication Date:
11/25/1952
Filing Date:
07/21/1950
Assignee:
Cushman, Cecil A.
Primary Class:
Other Classes:
2/209.7, D29/106
International Classes:
A42B3/12
View Patent Images:
US Patent References:
2194903Football helmet1940-03-26
2150290Athletic helmet1939-03-14
1886551Helmet1932-11-08
Foreign References:
GB189507870A1895-06-01
IT260607B