Ladder cap

Details Ladder cap Ladder cap

1995-06-22

1996-06-25

Clark, Doris

Building units and construction elements

Stair, ladder, scaffold, or similar support

Element or attachment

Patent

active

D03712079

REFERENCES:
patent: D265592 (1982-07-01), Perkins
patent: 274448 (1883-03-01), Kinzel
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patent: 2993562 (1961-07-01), Hussey
patent: 3062319 (1962-11-01), Wright
patent: 3419109 (1968-12-01), Costlow et al.
patent: 3773143 (1973-11-01), Del Prete et al.
patent: 3993163 (1976-11-01), Barrett
patent: 4394887 (1983-07-01), Spinks
patent: 4440263 (1984-04-01), Smith
patent: 4491192 (1985-01-01), Skarsten
patent: 4899848 (1990-02-01), Parr
patent: 5012895 (1991-05-01), Santos
patent: 5117941 (1992-06-01), Gruber

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