Geometrical instruments – Straight-line light ray type – Alignment device
Reexamination Certificate
2006-11-28
2006-11-28
Gutierrez, Diego (Department: 2859)
Geometrical instruments
Straight-line light ray type
Alignment device
C273S371000, C033S506000, C033S276000, C033SDIG021
Reexamination Certificate
active
07140117
ABSTRACT:
A dartboard positioning device and method includes a housing that has a back wall, a front wall, a first side wall, a second side wall, a top wall and a bottom wall. The back wall is arcuate and abuttable against an edge of a dartboard. A center mark indicator is positioned on the first side wall. A distance measuring assembly is positioned in the housing and is adapted for determining a distance from the center mark indicator to a selectable point. A laser pointer mounted on the first side wall defines the center mark indicator and is adapted for directing a point of light away from the housing. The laser pointer is angled with respect to the housing so that the point of light strikes a floor surface spaced 7′ 9.25″ from the first side wall when the center mark indicator is positioned 5′ 8″ above the floor surface.
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Gutierrez Diego
Reis Travis
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