Patents by Inventor William G. Walller

William G. Walller 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 and apparatus for incremental computation of a linear function
    Patent number: 5136689
    Abstract: A determination as to whether the linear change in a dependent variable Y=(Dy/Dx)*X resulting from an ith step change of magnitude dx in an independent variable X would be better approximated by a change m*dy or a change (m+1)*dy in the dependent variable, is made by(a) setting m equal to floor (Dy/abs(Dx)), setting r equal to (Dy/abs(Dx))-m, setting DirX equal to Dx/abs)Dx), and setting Er equal to r-0.5; and(b) for each value of i in the range from 1 to (Dx/dx)-1, determining whether Er is less than 0 and, if so, setting Er equal to Er+r, X equal to X+DirX*dx and y equal to Y+m*dy, and otherwise setting Er equal to Er+r-1, X equal to X+DirX*dx and Y equal to Y+(m+1)*dy.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: August 4, 1992
    Assignee: Tektronix, Inc.
    Inventor: William G. Walller