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US Patent: 1,283,755
Propeller-hub boring and facing machine
Patentee:
Spencer Heath - Baltimore, MD

USPTO Classifications:
144/3.5

Tool Categories:
metalworking machines : drilling and boring
woodworking machines : wood drilling and boring

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Nov. 05, 1918

Patent Pictures:
USPTO pdf tiff
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