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US Patent: 2,330,167
Thermally Insulated Hobbing Machine
Patentee: William F. Zimmermann (exact or similar names) - Maplewood, Essex County, NJ USPTO Classifications: 408/42, 409/16, 409/21, 82/900 Tool Categories: metalworking machines : gear making machines : gear hobbing machines Assignees: Gould & Eberhardt - Newark, Essex County, NJ Manufacturer: Gould & Eberhardt - Newark, Essex County, NJ Witnesses: Unknown	Patent Dates: Applied: Nov. 13, 1939 Granted: Sep. 21, 1943 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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