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US Patent: 20,943
Carpenter's Rule
Patentee:
Wm. O. C. Fritschler - Brooklyn, NY

USPTO Classifications:
33/381, 33/388, 33/498

Tool Categories:
rules : folding rules
layout tools : squares
layout tools : levels : wooden levels

Assignees:
None

Manufacturer:
Unknown

Witnesses:
J. L. Kingsly
C. S. Newell

Patent Dates:
Granted: Jul. 20, 1858

Patent Pictures:
USPTO pdf tiff
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Description:
Called by the inventor "Combined Square, Plumb, Sextant, and Level." Known example is marked "W.O.C. FRITSCHLER PATENT" and "JULY 20, 1858" Only one arm has scale markings. Known example closely follows the patent drawing. A similarity with L.C. Stephen's patent, 19,105, can be seen.

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