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US Patent: 67,487
Improvement in adjustable parallel rulers
Patentee:
Edward Bostock (exact or similar names) - Albany, NY

USPTO Classifications:
33/454

Tool Categories:

Assignees:
None

Manufacturer:
Bostock & Pancoast - Philadelphia, PA

Witnesses:
Lou. Hodgkins
W. H. Wallace
Patent Dates:
Granted: Aug. 06, 1867

Patent Pictures: [ 1 | 2 | 3 ]
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Description:
One of these appeared in a Martin J. Donnelly auction.

Martin's description mentions this patent date and patentee. The item resembles this later patent of Bostock's 115,019.

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