US Patent: 1,430,990
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Calipers
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Patentee:
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Henry Hendrickson (exact or similar names) - Telluride, CO |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Apr. 20, 1920 |
Granted: |
Oct. 03, 1922 |
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Ralph Brendler
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Description: |
This is a design for calipers capable of taking and holding three separate measurements at once. |
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