US Patent: 1,318,162
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| Luminous Level
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Patentee:
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| Ernest J. Loring (exact or similar names) - Washington, DC |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 16, 1919 |
| Granted: |
Oct. 07, 1919 |
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Russ Allen.
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Description: |
| Military type patent. Adjacent luminous strip is placed adjacent to the level in order to illuminate the bubble but limiting the light signature to anyone other than the individual using the level.
Two interesting annotations on this patent:
Filed under the Act of March 3, 1883, 22 Stat. L., 625
...may be used by the Government, or any of its officer or employees in the prosecution of work for the Government, or by and other person in the United States without payment of any royalty thereon. |
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