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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:
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