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US Patent: 2,317,099
Step threading machine
Patentees: Harold J. Siekmann (exact or similar names) - Cincinnati, OH William F. Groene (exact or similar names) - Cincinnati, OH USPTO Classifications: 29/47, 470/18, 470/80, 470/99, 82/110 Tool Categories: trade specific : gunsmith Assignees: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Manufacturer: R. K. LeBlond Machine Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Jun. 11, 1942 Granted: Apr. 20, 1943 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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