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US Patent: 433,264
Parallel Ruler
Patentee:
Joseph R. Anderson (exact or similar names) - Philadelphia, PA

USPTO Classifications:
33/454

Tool Categories:
rules : parallel rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Sep. 16, 1889
Granted: Jul. 29, 1890

Patent Pictures:
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