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US Patent: 4,866,319
Erasing machine
Patentee: Mack W. Crutchfield (exact or similar names) - Dallas, TX USPTO Classifications: 15/3.53, 200/61.85, 310/47, 310/89, 451/358 Tool Categories: trade specific : draftsman Assignees: Rotex Co. - Dallas, TX Manufacturer: Rotex Mfg. Co. - Dallas, TX Witnesses: Unknown	Patent Dates: Applied: Jul. 12, 1988 Granted: Sep. 12, 1989 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Rotex Co.

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