Material or article handling equipment – Conveying – lifting – or transferring article – Crane or hoist
Patent
1997-04-15
2000-06-20
Douglas, Alan P.
Material or article handling equipment
Conveying, lifting, or transferring article
Crane or hoist
D23263, 1205
Patent
active
D04269322
REFERENCES:
patent: 43130 (1864-06-01), Perry
patent: D132939 (1942-06-01), Corley
patent: D135634 (1943-05-01), Stark et al.
patent: 1960557 (1934-05-01), Snyder
patent: 1972294 (1934-09-01), Fantz
patent: 2066775 (1937-01-01), Fritsch
patent: 4265472 (1981-05-01), Ipsen
Pocket Guide to Flanges, Fittings and Piping Data; p. 43; 90-degree elbows, 1992.
Douglas Alan P.
Taylor Robin V.
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