Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Reexamination Certificate
2007-02-06
2007-02-06
Fulton, Christopher W. (Department: 2859)
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
C033S465000
Reexamination Certificate
active
11111637
ABSTRACT:
A folding ruler is provided. One embodiment of the folding ruler includes a first panel, a second panel, a hinge and a stiffening member. The first and second panels are interconnected end to end by the hinge so that the ruler can move between a folded state wherein the first and second panels are generally parallel and overlapping, and an unfolded state wherein the first and second panels are coplanar and oriented end to end. The stiffening member couples with the first and second panels to lock the first and second panels in the unfolded state. In some embodiments the stiffening member provides a grip for holding the ruler.
REFERENCES:
patent: 1120443 (1914-12-01), Buck
patent: 1210370 (1916-12-01), Dvorak
patent: 1979567 (1934-11-01), Nicholson
patent: 4203227 (1980-05-01), Giroux
patent: 5471749 (1995-12-01), Brady
patent: 2250959 (1992-06-01), None
Fulton Christopher W.
Gardner & Carton & Douglas LLP
Learning Resources, Inc.
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