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US Patent: 1,455,556
Clamping Mechanism for Machine Tools
Patentee: William H. Thorne (exact or similar names) - Philadelphia, PA USPTO Classifications: 409/343 Tool Categories: metalworking machines : metal planers Assignees: William Sellers & Co., Inc. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Robert R. Ketchel	Patent Dates: Applied: Jul. 20, 1921 Granted: May 15, 1923 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for William Sellers & Co.
Description: Frank S. Busser - patent attorney

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