Patents by Inventor Campbell Cromar

Campbell Cromar 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 manufacturing cathode ray tube display devices
    Patent number: 5873759
    Abstract: In a method and apparatus for manufacturing a cathode ray tube display device, the electrical characteristics and electron beam landing characteristics of a cathode ray tube are measured. A machine-readable recording the measured electrical and beam landing characteristics is then generated. The machine readable recording is then associated with the cathode ray tube. The cathode ray tube and the associated machine readable recording are then supplied to the display device production line.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: February 23, 1999
    Assignee: International Business Machines Corporation
    Inventors: Martin Huw Ball, Campbell Cromar, Hugh James Kelly