Static structures (e.g. – buildings) – Stepped; e.g. – stair
Patent
1996-05-24
1998-09-15
Friedman, Carl D.
Static structures (e.g., buildings)
Stepped; e.g., stair
52190, 52188, 52191, 52187, 52712, 248300, E04F 1100, E04F 1910
Patent
active
058062548
ABSTRACT:
Flanged Triangular elements for constructing a stairway which can be joined to provide a beam having adjacent tread and riser mounting portions.
REFERENCES:
patent: 4583334 (1986-04-01), Hubbard
patent: 4850164 (1989-07-01), McLeod
patent: 5293722 (1994-03-01), Reimann
Edwards W. Glenn
Friedman Carl D.
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