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US Patent: 3,263,723
Machine and method for preparing a door and door frame for prehanging such door
Patentees: Richard M. Sheffield (exact or similar names) - Chico, CA Robert N. Norlie (exact or similar names) - Chico, CA USPTO Classifications: 144/27, 144/3.1, 144/353, 144/371 Tool Categories: woodworking machines : cutter head machines : routing machines Assignees: Norfield Mfg. Co. - Chico, CA Manufacturer: Norfield Mfg. Co. - Chico, CA Witnesses: Unknown	Patent Dates: Applied: Jul. 22, 1963 Granted: Aug. 02, 1966 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Norfield Industries

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