Title:
Tubular structure
United States Patent 3349538

Inventors:
Virginia, Crossman A.
Publication Date:
10/31/1967
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Assignee:
Virginia, Crossman A.
Primary Class:
52/653.200
Other Classes:
52/301, 256/59
International Classes:
E04B1/58; E04B2/76; E04C3/06; E04C3/28; E06B3/96; E04C3/02; E04C3/04
US Patent References:
3256659Partition-forming assemblies and components thereof
3305221Guardrail construction