Geometrical instruments – Scriber – Curved line
Reexamination Certificate
2005-12-27
2005-12-27
Bennett, G. Bradley (Department: 2859)
Geometrical instruments
Scriber
Curved line
C033S465000, C033S471000
Reexamination Certificate
active
06978550
ABSTRACT:
A protractor and ruler combination includes a main ruler having a side formed with a protractor, a secondary ruler rotatably mounted on the main ruler, and an auxiliary ruler having a side secured on the secondary ruler, so that the secondary ruler is moved in concert with the auxiliary ruler on the protractor of the main ruler. Thus, the auxiliary ruler is moved relative to the main ruler, and the secondary ruler is moved in concert with the auxiliary ruler on the protractor of the main ruler, so that the included angle between the ruler section of the main ruler and the ruler section of the auxiliary ruler is measured exactly.
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Bennett G. Bradley
Cohen Amy R.
Kamrath Alan D.
Nikolai & Mersereau , P.A.
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