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Patent number:
Patent Date:
US Patent: 436,223
Expanding Mandrel
Patentee:
John T. Evely (
exact
or
similar
names) - Washington, DC
USPTO Classifications:
82/169
Tool Categories:
metalworking tools
:
mandrels and arbors
Assignees:
John T. Evely
- Washington, DC
William W. Dudley
- Washington, DC
Frank L. Browne
- Washington, DC
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jan. 31, 1890
Granted:
Sep. 09, 1890
Patent Pictures:
USPTO
(New site tip)
Google Patents
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