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US Patent: 2,790,361
Jack mechanism
Patentees: Walter S. Swanson (exact or similar names) - Rockford, IL Fred R. Swanson (exact or similar names) - Rockford, IL Herman E. Bargren (exact or similar names) - Rockford, IL USPTO Classifications: 269/20, 269/234, 269/254.0CS, 269/254R, 269/310 Tool Categories: Assignees: Sundstrand Machine Tool Co. - Rockford, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 14, 1953 Granted: Apr. 30, 1957 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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