US Patent: 99,961
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Improvement in Calipers
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Patentee:
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William Slar (exact or similar names) - Franklin, PA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Granted: |
Feb. 15, 1870 |
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Ralph Brendler
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Description: |
This caliper design feature a pair of adjustable graduated arcs, one for reading inside measurements and one for reading outside measurements. |
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