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US Patent: 72,740
Clinometers & Levels
Patentee:
John L. L. Knox (exact or similar names) - Pittsburgh, PA

USPTO Classifications:
33/391

Tool Categories:
layout tools : levels : wooden levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Dec. 31, 1867

Patent Pictures:
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