Patents by Inventor Gottfried Acher

Gottfried Acher 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).

  • Capacitive card module
    Patent number: 5034740
    Abstract: A capacitive card module is composed of a plurality of capacitive switch elements arranged on a carrier layer. In order to reduce parasitic coupling capacitances, the carrier layer is provided with a first shielding surface fashioned as an interconnect grid and connected to a voltage potential, and second shielding surfaces are located in the grid regions of the first shielding surface. The first shielding surface is composed of a conductor material that is electrically more conductive than that of the second shielding surfaces.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: July 23, 1991
    Assignee: Siemens Aktiengesellschaft
    Inventor: Gottfried Acher