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US Patent: 981,810
Grindstone Attachment
Patentee: David I. Sterling (exact or similar names) - Berea, Cuyahoga County, OH USPTO Classifications: 125/11.03, 125/37, 451/213, 451/369, 451/380 Tool Categories: metalworking machines : grinders : grinding attachments Assignees: Cleveland Stone Co. - Cleveland, Cuyahoga County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 20, 1906 Granted: Jan. 17, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Cleveland Stone Co.

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