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US Patent: 410,484
Machine for Cutting Screw Blanks and Screws
Patentee:
John P. Berkholz (exact or similar names) - Philadelphia, PA

USPTO Classifications:
470/176, 470/69

Tool Categories:
metalworking machines : cutting-off and centering machines
metalworking machines : metal threading machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 26, 1889
Granted: Sep. 03, 1889

Patent Pictures:
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