Patents by Inventor Erwin Dorfler

Erwin Dorfler 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).

  • Illuminating device for a push-button switch
    Patent number: 4385221
    Abstract: A device for illuminating at least one hood-shaped push button, provided with a transparent surface, of a push-button switch having at least one source of light and having light-guide means acted on by the source. In the hood-shaped push button there is a light-conducting prism whose active illuminating surface is adjacent the light transparent area of the push button, two additional surfaces of the prism being coordinated to the source of light and formed such that the prism is illuminated by the source of light indirectly in one position of the push button and directly in the other position of the push button.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: May 24, 1983
    Assignee: VDO Adolf Schindling AG
    Inventor: Erwin Dorfler