Geometrical instruments – Miscellaneous – Light direction
Reexamination Certificate
2007-08-14
2007-08-14
Smith, R. Alexander (Department: 2859)
Geometrical instruments
Miscellaneous
Light direction
C052S098000, C052S105000
Reexamination Certificate
active
11405711
ABSTRACT:
A building board such as a gypsum board is provided for use in construction of commercial and residential building the board having opposed parallel surfaces, one having spaced apart transverse markings and the other having spaced apart longitudinal markings. Each marking is associated with a string embedded therein, and a releasable paper layer is coextensively adhered to each surface of the board adapted to be peeled away from the surface when the cord is pulled to peel away the releasable paper, and the desired size board is cut by breaking the board along the markings.
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