Patents by Inventor Johnny Wilhelmus VAN DER Velden

Johnny Wilhelmus VAN DER Velden 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).

  • Flash array
    Patent number: 4101260
    Abstract: A flash array which is provided with a transparent electrically conductive layer which serves to prevent spontaneous ignition of a flash lamp in the device. The flash array is provided with high voltage combustion flash lamps and the transparent electrically conductive layer consisting of conductive indium oxide which is applied to the inner side of a transparent cover of the array. The resistance per square of that layer is smaller than 100 kOhm, so that for these lamps -- which are, for example, ignited by means of a piezo element -- substantially no spontaneous ignition occurs.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: July 18, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Markus Wilhelm Matthijs Wanninkhof, Johnny Wilhelmus VAN DER Velden, Pieter Hendrik Broerse