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US Patent: 857,991
Combined Level and Plumb
Patentee:
William A. Gibson - Enid, OK

USPTO Classifications:
33/399

Tool Categories:
layout tools : levels : inclinometers
layout tools : levels : level adjustments

Assignees:
None

Manufacturer:
Gibson Plumb Level Mfg. Co. - Lahoma, OK

Witnesses:
J. N. Fillebrown
E. Mueller
Louis C. Starke
H. F. Riley

Patent Dates:
Applied: Aug. 06, 1906
Granted: Jun. 25, 1907

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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Description:
This simple inclinometer features an unusual adjustment mechanism, and a pendulum unit that may be easily removed or replaced.

Production pieces were marked with the manufacturer's name and patent date on the metal plate.

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