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US Patent: 470,734
Oil-cup
Patentee:
Frank D. Winkley - Madison, WI

USPTO Classifications:
184/93

Tool Categories:
industrial machines : industrial machine mechanisms : industrial machine lubrication

Assignees:
None

Manufacturer:
Winkley Co. - Hartford, CT

Witnesses:
C. W. Murray
N. S. Johnson

Patent Dates:
Applied: Jun. 09, 1891
Granted: Mar. 15, 1892

Patent Pictures:
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Description:
This patent date was seen on the oil-fill cover of a bench-grinder mandrel from Builders Iron Foundry of Providence, RI.

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