Patents Assigned to Teknovent Oy
  • Ventilation unit
    Patent number: D325254
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: April 7, 1992
    Assignee: Teknovent Oy
    Inventor: Matti Ruuskanen
  • Propeller
    Patent number: D326080
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: May 12, 1992
    Assignee: Teknovent Oy
    Inventor: Heikki Vartiala