Patents by Inventor Marcus Joseph Hendriks

Marcus Joseph Hendriks 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).

  • Maintenance free emergency lighting
    Publication number: 20070194722
    Abstract: An emergency lighting device comprises an illumination lamp for illuminating an area and an energy storage unit for providing electrical energy for powering the lamp. According to the invention, the energy storage unit comprises an ultra-capacitor for storing the electrical energy. As the ultra-capacitor shows hardly any deterioration over time, extensive, e.g. periodical testing of the emergency lighting device during its lifetime can be omitted. A charging arrangement for charging the ultra-capacitor in the emergency lighting device is described.
    Type: Application
    Filed: December 1, 2004
    Publication date: August 23, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Bram Bruekers, Bartholomeus Corstiaans, Geert Van Der Veen, Marcus Joseph Hendriks, Markus Vermeulen