Patents by Inventor Lars Tyrefors

Lars Tyrefors 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).

  • Sterile package
    Patent number: 4042170
    Abstract: A sterile package of weldable plastic foil, has a sealing welding seam, joining two mutually opposite portions of said foil, interrupted by a disc shaped valve element of gas pervious material disposed between said portions and defining at least one through hole.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: August 16, 1977
    Assignee: AB Svenska Dental Instrument
    Inventors: Bjorn Ekman, Lars Tyrefors