Patents by Inventor Edward R. Cadena, Jr.

Edward R. Cadena, Jr. 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).

  • Third-party detection around pipelines
    Patent number: 4953144
    Abstract: Geophones are placed around pipelines to detect third parties, e.g., heavy construction vehicles. Associated computer equipment acquires data from the geophones and discriminates for the frequencies associated with heavy construction vehicles.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: August 28, 1990
    Assignee: Shell Oil Company
    Inventors: Robert Wing-Yu Chin, Vitold R. Kruka, Thomas L. Stewart, Robert W. Patterson, Edward R. Cadena, Jr.