Patents by Inventor Makiko Iwanabe

Makiko Iwanabe 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).

  • Method of updating layout of circuit element
    Patent number: 4805113
    Abstract: For the purpose of satisfying placement constraint prescribed by design rule data, a region to which a plurality of circuit elements appertain is displayed in such a way that this region is moved to such a position as to environ a part of the circuit elements and at the same time is superposed on a layout graph thereof. The placement of the circuit elements is updated such that some elements placed outside the foregoing region among all the circuit elements are made to enter this region.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: February 14, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuki Ishii, Makiko Iwanabe