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US Patent: 1,271,495
Method for Grinding Spline Shafts and Other Interrupted Cycindrical Bodies
Frederick Alexander Ward - Detroit, MI

USPTO Classifications:
29/893.35, 451/47, 451/48, 451/49, 464/179

Tool Categories:
metalworking machines : grinders : grinder dressers

Gear Grinding Machine Co. - Detroit, MI

Not known to have been produced

Kathleen C. Thompson
Ernest Parker
C. B. Bellknap
H. T. Bowmwn

Patent Dates:
Applied: Aug. 13, 1912
Granted: Jul. 02, 1918

Patent Pictures:
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"Vintage Machinery" entry for Gear Grinding Machine Co.

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