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US Patent: 1,798,059
Machine for making rotors
Patentees: Hugo Bilgram (exact or similar names) - Philadelphia, PA Myron F. Hill (exact or similar names) - Bridgeport, CT USPTO Classifications: 409/38, 409/48, 451/246, 451/900 Tool Categories: metalworking machines : gear making machines Assignees: Hill Engineering Co., Inc. - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 08, 1922 Granted: Mar. 24, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hugo Bilgram, Bilgram Machine Works

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