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US Patent: 2,236,057
Power center drive chuck
Patentees: Harold J. Siekmann (exact or similar names) - Cincinnati, OH William F. Groene (exact or similar names) - Cincinnati, OH USPTO Classifications: 451/398, 82/165 Tool Categories: metalworking machines : metal lathes : metal lathe chucks Assignees: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Manufacturer: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Oct. 20, 1939 Granted: Mar. 25, 1941 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for R. K. LeBlond Machine Tool Co.

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