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Patent number:
Patent Date:
US Patent: 163,217
Expanding Mandrel
Patentee:
Peter B. Lawson (
exact
or
similar
names) - Cold Springs, Putnam County, NY
USPTO Classifications:
192/75
,
242/571.8
,
279/2.17
,
279/2.22
,
451/381
,
5/133
,
81/436
,
81/447
,
82/168
,
82/169
Tool Categories:
metalworking tools
:
mandrels and arbors
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Apr. 26, 1875
Granted:
May 11, 1875
Patent Pictures:
USPTO
(New site tip)
Google Patents
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