Title:
Structural beam with fire extinguisher
United States Patent 2809074
US Patent References:
/1011335.html
- - 1011335

/1190824.html
- - 1190824

Reenforcement system for concrete structures
- - 1555989

Trussed girder
- - 1594505

Triangular joist
- - 2241617


Inventors:
Leonard, Mcdonald James
Publication Date:
10/08/1957
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Assignee:
Leonard, Mcdonald James
Primary Class:
239/209
Other Classes:
52/639, 239/550, 52/694, 169/5, 169/16, 52/168, 52/223.120, 52/650.100
International Classes:
A62C3/00; E04B1/94; E04C3/08; E04C3/10; E04C3/294; E04C3/04; E04C3/29
US Patent References:
2510958Composite floor of metal and concrete
2558946Reinforced cast structure
Foreign References:
FR485184A
GB562035A
GB614171A