Patents by Inventor Hannu Määttä

Hannu Määttä 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).

  • Surge protector
    Patent number: 6791812
    Abstract: Surge protector which includes a film pattern (2) formed on a suitable substrate (1) is characterized in that the film pattern (2) essentially consists of narrow lines (2a, 2b, 2c) which extend parallel and adjacent to each other and are electrically in parallel relationship to each other, and bridges (11-24) between the lines. Advantageously, there are three parallel lines. The resistance of the film pattern (2) is trimmed advantageously by cutting (T5, T6, T7, T8, T9, T10) one of the lines (2c) between successive bridges.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: September 14, 2004
    Assignee: Nokia Networks Oy
    Inventor: Hannu Määttä