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US 4,729,168 AGranted
Two-edged multi-purpose artistic technical knife
OwnerJia-Yong Yehinventor
Life of this patent
Estimating the term…
Abstract
An artistic technical knife which has a double-edged blade having a sharpened point at its terminus and a number of frangible recesses extending at oblique angles from one edge of the blade to the opposite side of the blade to divide the blade into a number of triangles; a blade holder; and a push knob for extending and retracting the blade from the blade holder; wherein the outermost triangle on the blade can be severed and removed at the outermost cleavage recess to provide a new sharpened point at the terminus of the blade.
Claims2
An artistic technical knife comprising:
- (a) a double-edged blade having a sharpened point at its terminus and a plurality of frangible recesses extending at oblique angles from one edge of the blade to the opposite edge of the blade to divide the blade into a plurality of triangles;
- (b) a blade holder;
- and
- (c) a push knob for extending and retracting the blade from the blade holder;
- wherein the outermost triangle on the blade can be severed and removed at the outermost frangible recess to provide a new sharpened point at the terminus of the blade.
2 more elements
Dependencies are inferred from the claim text.