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US Patent: 582,092
Air-hoist
Patentee: William H. Ridgway (exact or similar names) - Coatesville, PA USPTO Classifications: 92/110, 92/113, 92/12 Tool Categories: material handling : hoists, winches, come-alongs Assignees: None Manufacturer: Craig Ridgway & Son Co. - Coatesville, PA Witnesses: C. Ridgway J. W. Wingard	Patent Dates: Applied: Aug. 28, 1896 Granted: May 04, 1897 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Craig Ridgway & Son Co.
Description: Subsequently improved in patent 649,357.

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