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US Patent: 3,216,599
Lift truck with a detachable mast assembly, and a propelling and elevating control system
Patentee: Fred P. Hopfeld (exact or similar names) - Elmwood Park, IL USPTO Classifications: 187/223, 414/634 Tool Categories: material handling : pallet jacks, forklifts, elevating trucks material handling : dollies, carts and hand trucks Assignees: Grand Specialties Co. - Chicago, IL Manufacturer: Grand Specialties Co. - Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Oct. 15, 1962 Granted: Nov. 09, 1965 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Grand Specialties Co.

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