Built up metal tube, frame and skeletonized metal member of high strength weight, and method of forming same
United States Patent 1930285

Inventors:
Robinson, Roy H.
Publication Date:
10/10/1933
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Assignee:
Robinson, Roy H.
Primary Class:
138/143
Other Classes:
244/131, 29/455.100, 473/545, 244/123.120, 473/546, 138/117, 403/168, 138/115, 138/156, 138/116, 473/539, 244/123.900, 244/133, 138/113, 244/123.400, 138/148, 403/191, 244/125, 114/79W, 138/114, 219/58, 244/119
International Classes:
A63B49/02; B64C3/00; F16L9/02; F16L9/00