Patents by Inventor Patrick P. de Cavaignac

Patrick P. de Cavaignac 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).

  • Patent number: 3974493
    Abstract: In a keyboard entry word processing system, text is stored in a recirculating refresh memory along with a carriage return code at the end of each line. The text is displayed on a CRT screen. A cursor symbol, also displayed on the screen, may be moved by keyboard control to designate a particular character position on the screen where editing is to occur. When the cursor is within the field of displayed text, characters may be edited at the location in memory corresponding to the location of the cursor on the screen. When the cursor is outside the field of displayed text, the cursor is first "found" by altering the refresh memory to provide a new memory location corresponding to the cursor location, and then editing is performed at the new memory location.
    Type: Grant
    Filed: April 29, 1974
    Date of Patent: August 10, 1976
    Assignee: Vydec, Inc.
    Inventors: Patrick P. de Cavaignac, Peter D. Dickinson