Patents by Inventor Ying Ming Yu

Ying Ming Yu 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).

  • Patent number: 5133132
    Abstract: A safety blade has a cutting edge 41 formed with a plurality of protrusions or projections 42 extending in front of the blade in a comb structure which extends from one end of the cutting edge to the other. The projections prevent the edge from contacting skin, but do not prevent the cutting edge from performing its function. Such a blade may be used in kitchen utensils and cutlery, such as steak or fruit knives, or craft tools or the like.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: July 28, 1992
    Inventor: Ying-Ming Yu
  • Patent number: 4912846
    Abstract: A safety razor blade has a blade body with a substantially planar upper surface. A row of blunt convex protrusions are spaced along the forward edge portion of the blade body in a comb-like configuration. The protrusions have upper surfaces substantially coplanar with the upper surface of the blade body. Cutting elements are provided between the protrusions, each cutting element having an upper surface which tapers downwardly from the upper surface of the blade body to a cutting edge. The protrusions extend beyond the respective cutting edges.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: April 3, 1990
    Inventor: Ying Ming Yu