Patents by Inventor Matti Ruuskanen

Matti Ruuskanen 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).

  • Ventilation unit
    Patent number: D325254
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: April 7, 1992
    Assignee: Teknovent Oy
    Inventor: Matti Ruuskanen