Patents Assigned to AB Svenska Dental Instrument
  • 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