Patents by Inventor Friedrich L. Kuenemund

Friedrich L. Kuenemund 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).

  • Filter circuit for electric waves
    Patent number: 4393356
    Abstract: A filter circuit for electrical waves including at least one line which supplies electrical input waves and at least one line for withdrawing output electrical waves and in which the frequency dependent transmission characteristic is determined by coupled line loops each of which is in the form of a line ring and wherein coupling between the line loops is unidirectional and the individual line loops are designed so that they have unidirectional transmission characteristics.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: July 12, 1983
    Assignee: Siemens Aktiengesellschaft
    Inventor: Friedrich L. Kuenemund