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Patent number:
Patent Date:
US Patent: 800,268
Speed Changing Mechanism
Patentee:
Conrad M. Conradson (
exact
or
similar
names) - 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
(New site tip)
Google Patents
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