Patents by Inventor Trygve Gjerstad

Trygve Gjerstad 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).

  • Patientmask
    Patent number: D434141
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: November 21, 2000
    Assignee: Laerdal Medical AS
    Inventors: Bernt Kvam Randeberg, Kjell Ove Korneliussen, Trygve Gjerstad