Earthquake-resistant 3-post bridge support

Details Earthquake-resistant 3-post bridge support Earthquake-resistant 3-post bridge support

1996-01-18

1999-02-09

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

D25 1, 2504

Patent

active

D04055411

REFERENCES:
patent: D312314 (1990-11-01), Harris
patent: 502786 (1893-08-01), Storey
patent: 1670029 (1928-05-01), Fetter
patent: 2172123 (1939-09-01), Ebert
patent: 3591113 (1971-07-01), Foster, Jr.
patent: 3794277 (1974-02-01), Smedley et al.
patent: 4469307 (1984-09-01), Bell
patent: 4562673 (1986-01-01), Barari
patent: 5564237 (1996-10-01), Yoneda

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