Patents by Inventor John H. Coster

John H. Coster 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).

  • Clock signal generation
    Patent number: 4835491
    Abstract: A clock signal generator is based on a phase locked loop arrangement. The loop includes an adjustable divider. The reference signal for the loop is applied to another adjustable divider. This allows the generation of a wide range of frequencies by appropriate selection of the division ratios.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: May 30, 1989
    Assignee: Hewlett-Packard Company
    Inventor: John H. Coster