Patents by Inventor Philip P. Jenkins

Philip P. Jenkins 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).

  • Personnel detection and protection systems for use in underground mines
    Patent number: 4722574
    Abstract: A personnel detection and protection system comprises sensor means for detecting the presence of personnel in a prohibited operational zone, and for deriving signal means indicative of such a detected presence, and control means responsive to the deriving of such signal means to control the operation or movement of equipment in the prohibited zone.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: February 2, 1988
    Assignee: Coal Industry (Patents) Limited
    Inventors: Derek K. Barham, Philip P. Jenkins