Patents by Inventor Roger K. Engel

Roger K. Engel 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).

  • Pressure relief valve
    Patent number: 7178555
    Abstract: A pressure relief valve that is mountable to protect packaging so as to vent pressurized gases contained within the packaging. The present invention also pertains to a pressure relief valve which includes at least one passageway defined by at least one inner rail and which is in communication with an aperture.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: February 20, 2007
    Assignee: Plitek, LLC
    Inventors: Roger K. Engel, Dave Carroll
  • Pressure relief valve
    Publication number: 20040050437
    Abstract: A pressure relief valve that is mountable to protect packaging so as to vent pressurized gases contained within the packaging. The present invention also pertains to a pressure relief valve which includes at least one passageway defined by at least one inner rail and which is in communication with an aperture.
    Type: Application
    Filed: June 27, 2003
    Publication date: March 18, 2004
    Inventors: Roger K. Engel, Dave Carroll
  • Method for manufacturing lifter for a disc cartridge and feed stock therefor
    Patent number: 5561574
    Abstract: A feed stock for manufacturing lifters for disc cartridges, wherein the feed stock can be separated into individual lifters at an assembly station, the lifters to be applied inside the cartridge for pressing a cartridge liner against the disc at a location within the cartridge.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: October 1, 1996
    Assignee: Plitek L.L.C.
    Inventors: Roger K. Engel, Karl K. Hoffman