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US Patent: 1,961,925
Testing Device
Patentees: John C. Drader (exact or similar names) - Detroit, Wayne County, MI William F. Dalzen (exact or similar names) - Gross Point Park, Wayne County , MI USPTO Classifications: 33/501.14 Tool Categories: metalworking machines : gear measuring machines Assignees: Michigan Tool Co. - Detroit, Wayne County, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 24, 1928 Granted: Jun. 05, 1934 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Michigan Tool Co.

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