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US Patent: 1,768,692
Tool Scraper for piston ring grooves
Patentee: Reuben A. Kaplan (exact or similar names) - Owatonna, Steele County, MN USPTO Classifications: 15/104.012, 82/114 Tool Categories: trade specific : vehicle repairer : vehicle mechanic : piston and ring maintenance Assignees: Owatonna Tool Co. - Owatonna, Steele County, MN Manufacturer: Owatonna Tool Co. - Owatonna, Steele County, MN Witnesses: Unknown	Patent Dates: Applied: Jul. 15, 1927 Granted: Jul. 01, 1930 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Owatonna Tool Co. (OTC)

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