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US Patent: 800,268
Speed Changing Mechanism
Patentee:
Conrad M. Conradson - Warren, Warren County, PA

USPTO Classifications:
475/271, 475/325, 475/328

Tool Categories:
metalworking machines : metalworking machine mechanisms : metalworking variable speed mechanisms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 29, 1904
Granted: Sep. 26, 1905

Patent Pictures:
USPTO pdf tiff
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