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US Patent: 150,687
Screw Cutting Machines
Patentees:
Joseph L. Hall (exact or similar names) - Cincinnati, Hamilton County, OH
Henry Millward (exact or similar names) - Cincinnati, Hamilton County, OH

USPTO Classifications:
408/147, 408/180, 470/73

Tool Categories:
metalworking machines : metal lathes : screwcutting lathes

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Apr. 06, 1874
Granted: May 12, 1874

Patent Pictures:
USPTO (New site tip)
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