Patents by Inventor Lauri Vayrynen

Lauri Vayrynen 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 filter
    Patent number: 4077784
    Abstract: An electric filter for separating impurities from air including a housing which contains separator plates disposed in spaced relationship and formed of conductive material and alternate ones of said plates are connected to opposite poles of a source of voltage.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: March 7, 1978
    Inventor: Lauri Vayrynen