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US Patent: 363,657
Tire Indicator Countour Scribe for Railroad Wheels
Patentee: John MacKenzie (exact or similar names) - Cleveland, OH USPTO Classifications: 33/23.01 Tool Categories: layout tools : scribes Assignees: None Manufacturer: Not known to have been produced Witnesses: W. E. Donnely Albert E. Lynch N. S. Mustutz Geo. W. King	Patent Dates: Applied: Feb. 08, 1887 Granted: May 24, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a simple contour scribe designed to accurately trace the wear surface on a railroad wheel.

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