Building units and construction elements – Stair – ladder – scaffold – or similar support – Stepped
Patent
1992-11-17
1994-10-11
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Stepped
D 6350
Patent
active
D03514765
REFERENCES:
patent: D198679 (1964-07-01), Cartner
patent: D212086 (1968-08-01), Gilman
patent: D273919 (1984-05-01), Pasinski
patent: D297790 (1988-09-01), Melvin
patent: D307800 (1990-05-01), Hradisky
patent: D330462 (1992-10-01), Szablak et al.
patent: D335966 (1993-06-01), Schwartz et al.
patent: 1933602 (1933-11-01), Scherer
patent: 2666210 (1954-01-01), Wiley
patent: 4753320 (1988-06-01), Walter
Clark Doris
Grosfillex Sarl
Word A. Hugo
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