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US Patent: 866,922
Engine
Patentee:
William O. Duntley - Chicago, IL

USPTO Classifications:
74/580, 74/586, 91/14, 91/180

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:
Gertrude C. Armstrong
S. E. Hibben

Patent Dates:
Applied: Apr. 08, 1907
Granted: Sep. 24, 1907

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

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