Portable roof lifting apparatus

Details Portable roof lifting apparatus Portable roof lifting apparatus

1998-02-10

1999-04-20

Clark, Doris

Material or article handling equipment

Conveying, lifting, or transferring article

Crane or hoist

D25 62, 1205

Patent

active

D04086082

REFERENCES:
patent: D207723 (1967-05-01), Kane
patent: 224376 (1880-02-01), Armstrong
patent: D278172 (1985-03-01), Ellis
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patent: 3131907 (1964-05-01), Brown
patent: 3280939 (1966-10-01), Smith
patent: 3791627 (1974-02-01), Stone et al.
patent: 4004778 (1977-01-01), Steinhagen
patent: 4660679 (1987-04-01), Ostrobrod
patent: 5184860 (1993-02-01), Bouillon et al.
patent: 5265742 (1993-11-01), Stenger et al.
patent: 5341898 (1994-08-01), Baziuk
patent: 5431248 (1995-07-01), Willaughby

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