Patents by Inventor Rolf Johannsen

Rolf Johannsen 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).

  • Lateral transistor free of parisitics
    Patent number: 4303932
    Abstract: For the sake of an increased operational security and a reduction of substrate currents of an intergrated semiconductor circuit with a lateral transistor and a pn insulation, a protective zone exhibiting the opposite conductivity type and contacted barrier-free together with the collector of the collector electrode is inventively provided in the collector of the lateral transistor.
    Type: Grant
    Filed: August 10, 1979
    Date of Patent: December 1, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventor: Rolf Johannsen