Crane

Details Crane Crane

1991-11-20

1993-11-09

Chin, Kay H.

Material or article handling equipment

Conveying, lifting, or transferring article

Crane or hoist

D34 28

Patent

active

D03412423

REFERENCES:
patent: 3521860 (1970-07-01), Zehrung, Jr. et al.
patent: 4508233 (1985-04-01), Helms
patent: 4669703 (1987-06-01), Hawkins et al.
patent: 4899986 (1990-02-01), Tweedy
Air Technical Industries Flyer, May 1983, pp. 1 and 15.

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