Patents by Inventor Ilkka Hamalainen

Ilkka Hamalainen 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).

  • Electric heater
    Patent number: D287750
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: January 13, 1987
    Assignee: Rakennusvalmiste Oy
    Inventor: Ilkka Hamalainen
  • Electric heater
    Patent number: D287751
    Type: Grant
    Filed: April 24, 1984
    Date of Patent: January 13, 1987
    Assignee: Rakennusvalmiste Oy
    Inventor: Ilkka Hamalainen