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US Patent: 2,231,047
Hydraulic jack
Patentee: Adam Ziska (exact or similar names) - Wauwatosa, WI USPTO Classifications: 254/2B Tool Categories: Assignees: American Grinder & Specialty Corp. - Fond du Lac, WI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 14, 1939 Granted: Feb. 11, 1941 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for American Grinder & Specialty Corp.

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