Patents by Inventor Gerfried Felkel

Gerfried Felkel 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).

  • High voltage stable optical coupler
    Patent number: 4284898
    Abstract: An optical coupler has a radiation transmitter and a radiation receiver with a coupling medium disposed therebetween and surrounded by an enveloping mass. In order to avoid electric disruptive breakdowns in the boundary area between the coupling medium and the enveloping mass, an insulating film is applied on the surface of the conductor bands which carry the radiation transmitter and the radiation receiver, respectively.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: August 18, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerfried Felkel, Joerg Klann
  • Electro-optical coupling element
    Patent number: 4095116
    Abstract: A useful current component of an electro-optical coupling element is increased by providing a synthetic resin coupling medium having an adhered unitary encapsuling mass composed of the identical synthetic resin forming the coupling medium and containing therein a radiation reflecting material, such as titanium dioxide and a radiation impermeable material, such as aluminum bronze.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: June 13, 1978
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerfried Felkel, Gerhard Maier, Wolfgang Guenzel, Guenther Waitl