Patents by Inventor Petrus Johannes Julius Witterick

Petrus Johannes Julius Witterick 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 lamp unit
    Patent number: 4059387
    Abstract: A flash lamp unit having two connection members which are present on opposing surfaces of the unit and are each suitable for being coupled to a camera. The unit further comprises two series of flash lamps having associated reflectors, one series of flash lamps being arranged nearest to one surface and the other series being arranged nearest to the other surface. Each series of flash lamps can only be flashed by a cooperation between the connection member remote from that series.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: November 22, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Petrus Johannes Julius Witterick, Joannes Henricus Franciscus Sieben