Patents by Inventor Ilkka Tapani Heikkilä

Ilkka Tapani Heikkilä 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).

  • Two-sided illumination device
    Patent number: 8025434
    Abstract: A two-sided illumination device including a printed wiring board, a first light source and first translucent member connected to a first side of the wiring board, and a second light source and second translucent member connected to a second side of the wiring board. The first translucent member is configured to transfer light from the first light source to a surface of the first translucent member, while the second translucent member is configured to transfer light from the second light source to a surface of the second translucent member. The illumination device is used for illuminating a user input region of an apparatus.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: September 27, 2011
    Assignee: Nokia Corporation
    Inventors: Pentti Olavi Ahlgren, Ilkka Tapani Heikkilä