Patents by Inventor Geert Willem Van Der Veen

Geert Willem Van Der Veen 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).

  • Switching device
    Publication number: 20010020831
    Abstract: In a ballast circuit for operating a lamp, which comprises a bridge circuit and a control circuit for controlling the bridge switches, the control circuit comprises a microprocessor. The control signal for controlling the switches is generated by a separate circuit comprising a signal generator, a timer, two comparators and two reference signal generators. The microprocessor is used only to set the reference signals to the desired values, thereby dimming the lamp.
    Type: Application
    Filed: February 7, 2001
    Publication date: September 13, 2001
    Inventors: Geert Willem Van Der Veen, Everaard Marie Jozef Aendekerk