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US Patent: 501,942
Tool for trimming screw-threads
Patentee: Clinton Allen Higbee (exact or similar names) - Philadelphia, PA USPTO Classifications: 408/147, 470/186 Tool Categories: metalworking machines : metal threading machines Assignees: None Manufacturer: Not known to have been produced Witnesses: J. H. Russell Lewis R. Dick	Patent Dates: Applied: Jun. 20, 1892 Granted: Jul. 25, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: This is a tool to trim the start of a screw-thread in accordance with the inventor's patent 447,775. See also Canada patent CA-44,446.

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