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US Patent: 1,374,109
Change-of-speed mechanism
Patentee: Henry C. Pierle (exact or similar names) - Cincinnati, OH USPTO Classifications: 474/135, 474/81 Tool Categories: metalworking machines : drilling and boring : drill presses woodworking machines : wood drilling and boring : drill presses Assignees: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Manufacturer: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Jul. 14, 1919 Granted: Apr. 05, 1921 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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