Welder's helmet
United States Patent 2433164
US Patent References:
Welder's mask
- - 2363461


Inventors:
Shields, Raleigh T.
Publication Date:
12/23/1947
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Assignee:
Shields, Raleigh T.
Primary Class:
2/8.100
International Classes:
A61F9/06; A61F9/04