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US Patent: 224,962
Parallel Ruler
Patentee:
Charles D. Sigsbee - 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:
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