US Patent: 1,702,689
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| Hammer Level
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Patentee:
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| Samuel O. Duemler (exact or similar names) - Phoenix, AZ |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 06, 1928 |
| Granted: |
Feb. 19, 1929 |
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Russ Allen.
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Description: |
| Three levels mounted in the middle of the hammer with a flip out end cap to provide the second contact point for determining plumb and level. |
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