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US Patent: 892,107
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Patentee:
George R. Willis - Franklin, Venango County, PA

USPTO Classifications:
74/333

Tool Categories:
metalworking machines : metalworking machine mechanisms : metalworking variable speed mechanisms
metalworking machines : drilling and boring : vertical boring mills

Assignees:
Colburn Machine Tool Co. - Franklin, Venango County, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 30, 1903
Granted: Jun. 30, 1908

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Colburn Machine Tool Co.

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