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US Patent: 405,624
Sighting Attachment for Spirit-Levels
Patentee:
Justus A. Traut (exact or similar names) - New Britain, CT

USPTO Classifications:
33/290

Tool Categories:
layout tools : levels

Assignees:
The Stanley Rule & Level Co. - New Britain, CT

Manufacturer:
Not known to have been produced

Witnesses:
F. N. Stanley
H. S. Walter

Patent Dates:
Applied: Feb. 22, 1889
Granted: Jun. 18, 1889

Patent Pictures: [ 1 | 2 ]
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