Patents by Inventor Antti Häggman

Antti Häggman 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).

  • Radio apparatus with a planar antenna
    Patent number: 6946998
    Abstract: A method of changing an antenna pattern in a radio apparatus and a radio apparatus comprising a planar antenna structure with a first and a second plane are provided. In the solution both planes are arranged to act as a radiator plane and as a ground plane and the apparatus comprises means for interchanging the usages of the planes.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: September 20, 2005
    Assignee: Nokia Corporation
    Inventors: Mika Maarala, Antti Häggman, Ari Kalliokoski, Antti Lilja