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US Patent: 871,086
Engine
Patentees:
William O. Duntley - Chicago, IL
George H. Hayes - Philadelphia, PA

USPTO Classifications:
91/12, 91/174, 91/184

Tool Categories:
industrial tools : pneumatic tools
woodworking machines : handheld power tools : handheld drills

Assignees:
Chicago Pneumatic Tool Co. - Chicago, IL

Manufacturer:
Chicago Pneumatic Tool Co. - Chicago, IL

Witnesses:
Samuel E. Hibben
Henry R. Kent
Gertrude Crap
Edwin Stearne

Patent Dates:
Applied: Jun. 19, 1901
Granted: Nov. 12, 1907

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Chicago Pneumatic Tool Co.

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