Building units and construction elements – Stair – ladder – scaffold – or similar support – Sawhorse
Patent
1990-05-03
1993-04-13
Zarfas, Louis S.
Building units and construction elements
Stair, ladder, scaffold, or similar support
Sawhorse
Patent
active
D03348113
REFERENCES:
patent: D298056 (1988-10-01), Auerbach
patent: 1953012 (1934-03-01), Gerrard
patent: 2197187 (1940-04-01), Larson
patent: 2638386 (1953-05-01), Larson
patent: 2889178 (1959-06-01), Rambon
patent: 4296834 (1981-10-01), Kroger
patent: 4515243 (1985-05-01), Prior
Parks Roby A.
Shears W. Allan
Brown Robert A.
Clark Doris
Zarfas Louis S,.
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