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US Patent: 1,521,238
Grooving Machine
Patentee: John R. Gammeter (exact or similar names) - Akron, Summit County, OH USPTO Classifications: 157/1382 Tool Categories: specialty tools : automotive tools : tire facing and grooving tools Assignees: B. F. Goodrich Co. - Akron, Summit County, OH Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 30, 1922 Granted: Dec. 30, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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