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US Patent: 460,284
Device for Varying the Speed of Machinery
Patentee:
Conrad M. Conradson - Madison, Dane County, WI

USPTO Classifications:
476/31

Tool Categories:
industrial machines : industrial machine mechanisms : industrial machine speed changing mechanisms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 06, 1891
Granted: Sep. 29, 1891

Patent Pictures:
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