Patents by Inventor Nils Anders Johansson

Nils Anders Johansson 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).

  • Patent number: 6016125
    Abstract: The invention relates to an antenna device for portable radio equipment such as mobile telephones (10) and a method for producing the antenna device. Mobile telephone antennas should have good receiving sensitivity and at the same time be compact. An antenna which can be folded down, folded up or retracted into a mobile telephone becomes compact but the receiving sensitivity becomes bad. A solution is an antenna device which comprises two antennas, a primary antenna (11) and a secondary antenna (12). The primary antenna can take up two positions and is always connected to the radio circuits (16) of the mobile telephone. The secondary antenna is a small and compact antenna. When the mobile telephone is in the paging position, the primary antenna is placed in the folded down, folded up or retracted-in position, wherein the secondary antenna is also connected to the radio circuits. The two antennas form an antenna device which has good receiving sensitivity and is compact.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: January 18, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Nils Anders Johansson