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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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