Patents by Inventor Stephan Hellstab

Stephan Hellstab 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).

  • Multiple electrode system
    Patent number: 4389656
    Abstract: A multiple electrode apparatus comprising a stack of alternately arranged electrically insulating plates and electrically conductive plates, the insulating and conductive plates being comprised of substantially identical discs, each disc having a bore and being mounted on an electrically insulating mounting member, the discs being pressed together on the member by end pressure plates.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: June 21, 1983
    Assignee: Hugo Sachs Elektronik KG
    Inventor: Stephan Hellstab