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US Patent: 2,154,651
Tool retainer for portable power driven tools
Patentees: Hugo M. Zschau (exact or similar names) - Chicago, IL Oscar P. Wodack (exact or similar names) - Chicago, IL USPTO Classifications: 279/19.6, 403/223, 403/361, 403/377, 74/18.2 Tool Categories: woodworking tools : hand drills : drill chucks handheld power tools : handheld power drills Assignees: Wodack Electric Tool Corp. - Chicago, IL Manufacturer: Wodack Electric Tool Corp. - Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Mar. 04, 1937 Granted: Apr. 18, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Wodack Electric Tool Corp.

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