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US Patent: 1,749,300
Valve grinder
Patentees: Edward Henry Peterson (exact or similar names) - Chicago, IL William H. Odlum (exact or similar names) - Chicago, IL USPTO Classifications: 451/117 Tool Categories: Assignees: Duro Metal Products Co. - Chicago, IL Manufacturer: Duro Metal Products Co. - Chicago, IL Witnesses: Unknown	Patent Dates: Applied: Aug. 29, 1927 Granted: Mar. 04, 1930 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Duro Metal Products Co.

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