US Patent: 1,526,233
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| Drafting Square
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Patentee:
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| Edward J. Koile (exact or similar names) - Staunton, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 23, 1923 |
| Granted: |
Feb. 10, 1925 |
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Ralph Brendler
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Description: |
| This adjustable bevel square uses the corner of the square for an angle indicator. |
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