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US Patent: 2,953,903
Hydraulic system for operating simultaneously a plurality of power units
Patentees: Donald K. Skoog (exact or similar names) - Aurora, IL Leo Kramer (exact or similar names) - Aurora, IL USPTO Classifications: 60/424, 60/707, 81/470 Tool Categories: Assignees: Thor Power Tool Co. - Aurora, IL Manufacturer: Thor Power Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Dec. 23, 1957 Granted: Sep. 27, 1960 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thor Power Tool Co.

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