Patents by Inventor Svante Bertil Olofsson

Svante Bertil Olofsson 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).

  • Back pressure operated sound transmitter
    Patent number: 3942468
    Abstract: In a pressure gas driven, back pressure operated sound transmitter a damping chamber having an interior volume at least approximately equal to that of the back pressure chamber is inserted between the operating valve connected to the back pressure chamber and the throttle device bleeding gas from the back pressure chamber into the ambient atmosphere.
    Type: Grant
    Filed: September 10, 1974
    Date of Patent: March 9, 1976
    Assignee: Kockums Mekaniska Verkstads Aktiebolag
    Inventor: Svante Bertil Olofsson