US Patent: 824,299
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Combination-Rule
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Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Mar. 15, 1905 |
Granted: |
Jun. 26, 1906 |
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Ralph Brendler
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Description: |
This is a simple ruler with a series of holes to allow it to be used a a compass, and a graduated joint to allow it to be used a a protractor. |
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