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US Patent: 642,860
Oil-hole cover or cap
Patentee: Frank D. Winkley (exact or similar names) - Madison, WI USPTO Classifications: 184/93 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine lubrication : oil or grease fittings Assignees: None Manufacturer: Winkley Co. - Hartford, CT Witnesses: Charles N. Brown Frank J. Shealy	Patent Dates: Applied: Apr. 12, 1899 Granted: Feb. 06, 1900 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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