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Patent number:
Patent Date:
US Patent: 224,962
Parallel Ruler
Patentee:
Charles D. Sigsbee (
exact
or
similar
names) - Washington, DC
USPTO Classifications:
33/454
Tool Categories:
rules
:
parallel rules
Assignees:
None
Manufacturer:
Unknown
Witnesses:
William C. McIntire
F. W. Smith, Jr.
Patent Dates:
Applied:
Nov. 07, 1879
Granted:
Feb. 24, 1880
Patent Pictures:
USPTO
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