Patents Assigned to Ananda Anlageanstalt
  • Ballpoint pen cartridge
    Patent number: 3997273
    Abstract: A ball point pen cartridge comprising an elongated tube having one end open, a socket mounted in the other, a ball rotatably mounted in the socket, a marking fluid within the tube in contact with the ball and means for hermetically sealing the other end of the tube with a hydraulic seal while exerting pressure on the fluid.
    Type: Grant
    Filed: June 18, 1973
    Date of Patent: December 14, 1976
    Assignee: Ananda Anlageanstalt
    Inventor: Werner Germann