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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:
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