Patents by Inventor Hannu Tähkänen

Hannu Tähkänen 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).

  • Chip screening method and plant
    Patent number: 6907995
    Abstract: A chip screening method and plant wherein the pin chips (9) are separated from the rest of the chips and dosed among chips that are to be led to a subsequent process (7) so that the share of the pin chips (9) relative to the total amount of chips (7) does not exceed a desired value. After the screening process, a desired amount of pin chips (20) is dosed among the chips that are to be led to a subsequent process (7) without intermediate storage.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: June 21, 2005
    Assignee: Valmet Woodhandling Oy
    Inventor: Hannu Tähkänen