Geometrical instruments – Straightedge type – Combined with level
Patent
1987-05-06
1988-03-08
Stearns, Richard R.
Geometrical instruments
Straightedge type
Combined with level
33456, 33471, B43L 706, B43L 1300
Patent
active
047291737
ABSTRACT:
An adjustable carpenter's square is formed by having a main beam with a head secured to an upper portion of the main beam with a slide secured to the upper end of the main beam. The head and the slide are partially rotatablely secured to the main beam. The head and the slide are slideably and adjustably connected to each other also in addition to being connected to the head.
REFERENCES:
patent: 1046362 (1912-12-01), Adams
patent: 1076095 (1913-10-01), Brown
patent: 1289047 (1918-12-01), Hall
patent: 1344269 (1920-06-01), Goodie
patent: 1394088 (1921-10-01), Heller
patent: 1916638 (1933-07-01), Rizianu
patent: 2080792 (1937-05-01), Simmons
patent: 3345750 (1967-10-01), Hill
P. Perrone, Jr. Mathew R.
Stearns Richard R.
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