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US Patent: 304,601
Combined Square, Level and Triangle
Patentee:
F. W. Gustav Boettcher (exact or similar names) - Milwaukee, WI

USPTO Classifications:
33/343, 33/427

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

Assignees:
None

Manufacturer:
Unknown

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

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

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ]
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