Patents by Inventor Ko Isono

Ko Isono 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).

  • Graphics tablet scanning and error reduction
    Patent number: 5367130
    Abstract: Graphics tablet scanning and error reduction. Errors are detected and reduced by reading a plurality of points, sorting the points, and selecting the median point. Errors are detected and reduced by comparing the range of lowest to highest points with a preset limit and signaling an error if the limit is exceeded. Errors are detected and reduced in a resistive tablet by placing a load resistance on the output of the tablet and comparing the output voltage with predetermined limits, characterizing the contact area into valid and invalid contacts.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: November 22, 1994
    Assignee: Apple Computer, Inc.
    Inventor: Ko Isono