US Patent: 1,402,497
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| Calipers
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Patentee:
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| Walter A. Hoffman (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 21, 1921 |
| Granted: |
Jan. 03, 1922 |
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Ralph Brendler
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Description: |
| These calipers feature two dovetail-keyed blocks to hold the arms, with a fine screw-adjust to control the distance. The configurationof the arms allows them to be used for gauging both inside and outside measurements. |
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