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US Patent: 2,007,140
Pump Mechanism
Patentee: Eric R. Gradhe (exact or similar names) - Detroit, Wayne County, MI USPTO Classifications: 184/3.2, 184/30, 185/30 Tool Categories: industrial tools : tool lubricators : oil pumps Assignees: Detroit Lubricator Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 06, 1931 Granted: Jul. 02, 1935 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Detroit Lubricator Co.

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