Patents by Inventor Walther Persson

Walther Persson 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).

  • Multi-stage screw compressor interconnected via communication channel in common end plate
    Patent number: 4076468
    Abstract: Two stage screw compressor having two working spaces provided side by side with parallel axes within a common barrel member and extending in the same direction from a common plane surface of an end plate member in which one rotor of each stage are interconnected by a gear transmission including an input power shaft.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: February 28, 1978
    Assignee: Svenska Rotor Maskiner Aktiebolag
    Inventors: Walther Persson, Lauritz Benedictus Schibbye