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US Patent: 2,721,090
Socket retainer for rotary power tools
Patentee: Frank A. Kaman (exact or similar names) - Aurora, IL USPTO Classifications: 285/305, 403/328, 403/361, 411/347 Tool Categories: Assignees: Thor Power Tool Co. - Aurora, IL Manufacturer: Thor Power Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Mar. 15, 1952 Granted: Oct. 18, 1955 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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