Patents by Inventor Bob O. Evans

Bob O. Evans 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).

  • Stored program selector for electronic calculator
    Patent number: 3990053
    Abstract: A program selector in an electronic calculator has a number of formulas which are printed in human readable form. When a formula is selected by the operator a machine readable representation of the formula is positioned adjacent a transducer. The transducer generates an electrical signal which represents an identification of the particular mathematical formula or other type of program to be executed by the electronic calculator. The electrical signal is decoded by a decoder which generates a storage address for the starting point of the formula or program to be executed.
    Type: Grant
    Filed: October 15, 1973
    Date of Patent: November 2, 1976
    Assignee: International Business Machines Corporation
    Inventor: Bob O. Evans