Patents by Inventor Serge O. van Neck

Serge O. van Neck 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).

  • Slide calculator with liner
    Patent number: 5449890
    Abstract: A slide calculator includes a sleeve having a plurality of windows for presenting data from three variables arranged in matrices of rows and columns. Opposite sides of the sliding card include data with the rows and columns interchanged. The sleeve surrounding the sliding card is lined with a transparent plastic.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: September 12, 1995
    Inventor: Serge O. van Neck