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US Patent: 684,433
Differential Speed Mechanism
Patentee:
Herman R. Isler - Hamilton, OH

USPTO Classifications:
74/353

Tool Categories:
metalworking machines : metal lathes

Assignees:
Charles F. Hilker - Hamilton, OH

Manufacturer:
Not known to have been produced

Witnesses:
Arthur Letherby
Robert S. Carr
John Francis
J. M. Trembly

Patent Dates:
Applied: Feb. 04, 1901
Granted: Oct. 15, 1901

Patent Pictures:
USPTO pdf tiff
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Description:
Robert S. Carr - patent attorney

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