US Patent: 67,487
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Improvement in adjustable parallel rulers
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Patentee:
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Edward Bostock (exact or similar names) - Albany, NY |
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Patent Dates:
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Granted: |
Aug. 06, 1867 |
Patent Pictures:
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Russ Allen
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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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