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US Patent: 1,729,286
Adjustable Spacing Collar for Milling Cutters
Patentee: John B. Elfring (exact or similar names) - Cincinnati, Hamilton County, OH USPTO Classifications: 407/120, 407/31, 409/144, 409/228, 409/231 Tool Categories: metalworking machines : milling machines Assignees: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Manufacturer: Cincinnati Milling Machine Co. - Cincinnati, Hamilton County, OH Witnesses: Unknown	Patent Dates: Applied: Apr. 11, 1925 Granted: Sep. 24, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Milling Machine Co.
Description: This patent number was seen on a Cincinnati Milling Machine Co. patent plate 4FV-101.

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