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US Patent: 304,601
Combined Square, Level and Triangle
Patentee:
F. W. Gustav Boettcher - Milwaukee, WI

USPTO Classifications:
33/343, 33/427

Tool Categories:
layout tools : squares : bevel squares
layout tools : levels : machinist levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. G. Asmus
H. G. Underwood

Patent Dates:
Applied: Feb. 18, 1884
Granted: Sep. 02, 1884

Patent Pictures:
USPTO pdf tiff
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