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US Patent: 2,237,465
Change Gear Retaining Lock
Patentee: William F. Zimmermann (exact or similar names) - Maplewood, Essex County, NJ USPTO Classifications: 403/18, 411/517 Tool Categories: metalworking machines : metalworking machine mechanisms : metalworking machine gearing : metalworking speed changing mechanisms Assignees: Gould & Eberhardt - Newark, Essex County, NJ Manufacturer: Gould & Eberhardt - Newark, Essex County, NJ Witnesses: Unknown	Patent Dates: Applied: Mar. 09, 1939 Granted: Apr. 08, 1941 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Gould & Eberhardt

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