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US Patent: 179,167
Improvement in polishing-machines
Patentee:
Howard M. Du Bois - Philadelphia, PA

USPTO Classifications:
451/306

Tool Categories:
woodworking machines : sanding machines : belt sanders

Assignees:
Howard M. Du Bois - Philadelphia, PA
John G. Davis & Son - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
John A. Wiedersheim
John A. Bell

Patent Dates:
Applied: Jul. 31, 1875
Granted: Jun. 27, 1876

Patent Pictures:
USPTO pdf tiff
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