Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
June 16, 2009
Patent Application Number
11759496
Date Filed
June 7, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
Apparatus using two hinged L-shaped squares to determine perpendicular with respect to a plane. Placing the apparatus against a plane with the squares offset angularly with respect to each other and placing an object to be secured to a plane adjacent to the hinge within fins parallel to the hinge permits securing the object perpendicular to the plane with one hand while holding the apparatus and object with the other hand.
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