Patents by Inventor Launo Laakkonen

Launo Laakkonen 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).

  • Over-pressure valve for ventilation
    Patent number: D261925
    Type: Grant
    Filed: September 21, 1979
    Date of Patent: November 17, 1981
    Assignee: Oy Kolster Ab
    Inventor: Launo Laakkonen