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US Patent: 17,522
Cutting Screw Threads
Hob for Cutting Screw-Chasers
Patentee:
G. C. Schneider - Washington, DC

USPTO Classifications:
144/240, 407/59

Tool Categories:
metalworking tools : machinist tools : gear cutting tools

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Jun. 09, 1857

Patent Pictures:
USPTO pdf tiff
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