Patents by Inventor Stephen P. Langford

Stephen P. Langford 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).

  • Delay circuit which maintains its delay in a given relationship to a reference time interval
    Patent number: 5140202
    Abstract: A delay circuit for producing in an electrical circuit a time delay. The circuit includes a pulse generator which produces an edge at a given time interval after an edge is applied to its input. The time interval can be adjusted so that it automatically follows a reference time interval such as a clock period. The circuit has application in the read circuitry of digital tape devices.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: August 18, 1992
    Assignee: Hewlett-Packard Company
    Inventors: Stephen P. Langford, Kenneth D. Gennetten