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US Patent: 2,271,817
Micrometer Mechanism
Patentees: Hans Ernst (exact or similar names) - Cincinnati, OH Albert H. Dall (exact or similar names) - Cincinnati, OH USPTO Classifications: 475/176, 60/392, 91/32, 91/370, 91/375R Tool Categories: metalworking machines : grinding machines Assignees: Cincinnati Grinders, Inc. - Cincinnati, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 09, 1938 Granted: Feb. 03, 1942 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cincinnati Grinders, Inc.

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