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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:
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