Patents by Inventor Johannes Albert Frankena

Johannes Albert Frankena 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).

  • Dimmable light generating device
    Patent number: 8304998
    Abstract: A compact gas discharge lamp (301) comprising four (or more) interconnected tube segments (11, 12, 13, 14) is provided with an external electrode (310) that extends at least throughout the length of the tube segments and that is in contact with all tube segments. Several embodiments of the external electrode are disclosed. The external electrode is preferably connected to a node (C) midway between the lamp electrodes, to which end a capacitive divider (441, 442) is arranged in parallel with the lamp.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: November 6, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Harko Jan Taekema, Jacob Dijkstra, Pawel Leshem, Johannes Albert Frankena
  • DIMMABLE LIGHT GENERATING DEVICE
    Publication number: 20100253232
    Abstract: A compact gas discharge lamp (301) comprising four (or more) interconnected tube segments (11, 12, 13, 14) is provided with an external electrode (310) that extends at least throughout the length of the tube segments and that is in contact with all tube segments. Several embodiments of the external electrode are disclosed. The external electrode is preferably connected to a node (C) midway between the lamp electrodes, to which end a capacitive divider (441, 442) is arranged in parallel with the lamp.
    Type: Application
    Filed: December 8, 2008
    Publication date: October 7, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Harko Jan Taekema, Jacob Dijkstra, Pawel Leshem, Johannes Albert Frankena