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Patent number:
Patent Date:
US Patent: 501,547
Shaping and Spinning Metals by Electricity
Patentee:
Elihu Thomson (
exact
or
similar
names) - Swampscott, Essex County, MA
USPTO Classifications:
219/149
,
29/898.054
,
29/DIG.43
,
86/51
Tool Categories:
metalworking machines
:
electrical discharge machining
Assignees:
Thomson Electric Welding Co.
- Lynn, Essex County, MA
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jan. 08, 1891
Granted:
Jul. 18, 1893
Patent Pictures:
USPTO
(New site tip)
Google Patents
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