US Patent: 372,319
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Ruler
Pen and Ruler for Bookkeeping
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Patentee:
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| Joseph S. Mather (exact or similar names) - Wheeling, WV |
| USPTO Classifications: |
| 33/35 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 17, 1887 |
| Granted: |
Nov. 01, 1887 |
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Ralph Brendler
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Description: |
| This design covers an L-shaped ruler with a ink pen that slides along a track on the vertical element. This allows the pen to easily mark lines in a ledger book or the like. |
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