Patents by Inventor John C. Doering

John C. Doering 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 for replacing keyboard data using single step process mode
    Patent number: 5121472
    Abstract: In a computer system including a central processing unit, a program memory, a control program, a keyboard hardware interrupt handler routine and a single step interrupt handler routine, a method for replacing conventional data from a keyboard with user defined data including placing the central processing unit into single step mode, determining with the single step interrupt handler routine whether a keyboard hardware interrupt handler routine involves a keyboard data input instruction, and, if so, replacing the conventional data with user defined data, followed by either repeating the process or returning the system from single step mode to the main control program.
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: June 9, 1992
    Assignee: Polytel Computer Products Corporation
    Inventors: Sherif Danish, John C. Doering, Kris Kimbrough