Patents by Inventor Stewart L. Olsen

Stewart L. Olsen 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).

  • Low power optically coupled serial data link
    Patent number: 6590687
    Abstract: The invention relates to a system for optically transmitting digital information.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: July 8, 2003
    Assignee: El Paso Natural Gas
    Inventor: Stewart L. Olsen
  • Data communication interface device
    Patent number: 5051980
    Abstract: A Data Communication Device permits extended range RS-232 communications between two devices by utilizing a current loop between the remote device and the Data Communication Device. The Data Communication Device may be used for any mix of signal or control lines specified for RS-232 and will support multiple remote devices in a broadcast mode or half duplex polled mode. Only a single Data Communication Device per remote communications circuit is required.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: September 24, 1991
    Assignee: El Paso Natural Gas Company
    Inventor: Stewart L. Olsen