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US Patent: 447,017
Screw Machine
Patentee:
Christopher M. Spencer (exact or similar names) - Windsor, Hartford County,

USPTO Classifications:
226/157, 29/51

Tool Categories:
metalworking machines : screw machines

Assignees:
Christopher M. Spencer - Windsor Locks, Hartford County, CT
Arthur H. Eddy - Hartford, Hartford County, CT

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Sep. 26, 1890
Granted: Feb. 24, 1891

Patent Pictures:
USPTO (New site tip)
Google Patents
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