Patents by Inventor Karim Ramsi

Karim Ramsi 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-band transmitter-receiver with dual radiation device
    Patent number: 6788957
    Abstract: To enable a use of a two-band type mobile telephone with a dual radiation circuit, a selector switch is placed between this dual radiation circuit and transmission channels in each of these bands. Given the emergence of the second harmonic resulting from the presence of the selector switch, the undesirable components are filtered with a filter. A part of the reactive components of this filter is between the radiating circuit and the selector switch, while the other part is in the channel to be filtered. Depending on the nature of the channel, the other part in the channel to be filtered has different values.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: September 7, 2004
    Assignee: Sagem SA
    Inventors: Marc Recouly, Fernando Romao, Karim Ramsi