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US Patent: 1,133,353
Lubricator cup
Patentee: Charles F. Wray (exact or similar names) - Rochester, NY USPTO Classifications: 184/93 Tool Categories: Assignees: National Brass Mfg Co. - Rochester, NY Manufacturer: National Brass Mfg Co. - Rochester, NY Witnesses: Unknown	Patent Dates: Applied: Feb. 02, 1914 Granted: Mar. 30, 1915 Patent Pictures: [ 1 | 2 | 3 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen
Description: A datamp user reports seeing these cups usually called drip oilers. It's to provide a fill opening and swivel cover for same.

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