Patents by Inventor Jia-Yong Yeh

Jia-Yong Yeh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Two-edged multi-purpose artistic technical knife
    Patent number: 4729168
    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.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: March 8, 1988
    Inventor: Jia-Yong Yeh