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US Patent: 752,223
Variable-speed mechanism
Patentee:
Charles S. Hisey - Dayton, KY

USPTO Classifications:
74/354

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

Assignees:
Hisey-Wolf Machine Co. - Cincinnati, OH

Manufacturer:
Hisey-Wolf Machine Co. - Cincinnati, OH

Witnesses:
Oliver B. Kaiser
Luise Beck

Patent Dates:
Applied: Oct. 22, 1903
Granted: Feb. 16, 1904

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Hisey-Wolf Machine Co.

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