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US Patent: 6,469
Buoying Vessels over Shoals
Patentee:
Abraham Lincoln (exact or similar names) - Springfield, IL

USPTO Classifications:
114/123, 114/49

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. H. Sylvester
Z. C. Robbins

Patent Dates:
Granted: May 22, 1849

Patent Pictures: [ 1 | 2 ]
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Description:
This is the only patent ever granted to a person who became a U. S. president.

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