Title:
Portable structural assembly and interlocking units for constructing the same
United States Patent 2806561


Inventors:
Spangler, William B.
Application Number:
US34681553A
Publication Date:
09/17/1957
Filing Date:
04/03/1953
Assignee:
Spangler, William B.
Primary Class:
Other Classes:
52/276, 52/479, 52/630, 405/277, 446/124
International Classes:
E01C9/08
View Patent Images:
US Patent References:
2589304Interlocking structural units1952-03-18
2534501Vehicle body construction1950-12-19
2478993Flooring or surfacing structure1949-08-16
2180317Metal decking1939-11-14
1967620Metal floor beam construction1934-07-24
1274353N/A1918-07-30
Foreign References:
GB643921A1950-09-27