Patents by Inventor Ingmar Karl Linus Andren

Ingmar Karl Linus Andren 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).

  • Operating systems for trailer brakes
    Patent number: 3955652
    Abstract: An operating system for trailer brakes, where the pull and pressure on the coupling unit between the tractor and trailer vehicles are utilized to control the braking power of the trailer by sensing the pull and pressure on the coupling unit and regulating the supply of braking power via an amplifier.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: May 11, 1976
    Assignee: AB Linde International
    Inventors: Sture Nils Nilsson, Rune Sven Nilsson, Ingmar Karl Linus Andren