US Patent: 256,062
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Calipers
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Patentee:
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Edward C. Smith (exact or similar names) - Brooklyn, NY |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
May 19, 1881 |
Granted: |
Apr. 04, 1882 |
Patent Pictures:
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Ralph Brendler
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Description: |
These calipers use an adjustable worm gear mounted on one arm that engages teeth cut into the end of the other. |
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