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Patent number:
Patent Date:
US Patent: 420,484
Instrument for Copying Drawings
Patentee:
Ruel W. Whitney (
exact
or
similar
names) - San Francisco, San Francisco County, CA
USPTO Classifications:
33/23.05
Tool Categories:
trade specific
:
draftsman
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Aug. 23, 1889
Granted:
Feb. 04, 1890
Patent Pictures:
USPTO
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