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US Patent: 2,826,820
Hole gauges
Patentee: Charles Zelnick (exact or similar names) - Saginaw, MI USPTO Classifications: 33/544.6 Tool Categories: Assignees: Lufkin Rule Company - Saginaw, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 23, 1954 Granted: Mar. 18, 1958 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen

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