US Patent: 60,315
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Improvement in Scale Pencils
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Patentee:
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Benjamin Worcester (exact or similar names) - Waltham, MA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Granted: |
Dec. 04, 1866 |
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Ralph Brendler
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Description: |
This pencil features a scale engraved in the side of it, and a pair of sliding collars with marking points to allow it to be used as a marking gage or compass. |
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