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Patent number:
Patent Date:
US Patent: 202,768
Expanding Mandrel
Patentee:
Forbes H. Vannan (
exact
or
similar
names) - Wilkesbarre, Luzerine County, PA
USPTO Classifications:
82/169
Tool Categories:
metalworking tools
:
mandrels and arbors
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Mar. 14, 1878
Granted:
Apr. 23, 1878
Patent Pictures:
USPTO
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