US Patent: 56,013
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Goniometer
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Patentee:
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William W. Cooper (exact or similar names) - Washington, DC |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Granted: |
Jul. 03, 1866 |
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Joel Havens
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Description: |
An instrument for the precise measurement of angles, especially one used to measure the angles between the faces of crystals. |
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