Large T-square protractor for use in construction
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United States of America Patent
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Mar 21, 2017
Grant Date -
Jun 18, 2015
app pub date -
Feb 6, 2012
filing date -
Feb 6, 2012
priority date (Note) -
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Abstract
A framing T-square protractor apparatus includes a first rule element having first and second edges, a surface, and a length of about 3 ft between the first and second edges; a second rule element having first and second edges, a surface, and a length of about 5 ft between the first and second edges, the second rule element being pivotally connected to the first rule element midway between the first and second edges of the first rule element; and a semi-circular element extending between the first and second edges of the first rule element to form an 180 degrees arc with 0 to 90 degrees angle indicia on each half, the semi-circular element being connected to the first and second edges of the first rule element and being adapted to movably receive the second rule element for sliding along the semi-circular element.
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