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US Patent: 1,721,129
Adjusting Means for Threading Dies
Patentee: George M. Mehl (exact or similar names) - Erie, Erie County, PA USPTO Classifications: 407/110, 407/64, 407/78, 407/90, 408/16, 408/187, 470/82 Tool Categories: metalworking tools : tap and die holders Assignees: Williams Tool Corp. - Erie, Erie County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 25, 1927 Granted: Jul. 16, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John H. Hall & Sons, Ltd. / Williams Tool Corp.

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