Patents by Inventor Meindert Visser

Meindert Visser 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).

  • Emergency lighting system
    Patent number: 4887004
    Abstract: An emergency lighting unit comprises a battery-powered converter circuit for maintaining a discharge in a gas discharge or fluorescent light, the converter circuit also being arranged to generate a high voltage for striking the discharge in the light. When the mains supply is good and a switch is closed for turning on the light, the converter circuit is activated to provide its high voltage for striking the discharge, after which the discharge is maintained from the mains supply. If the mains should then fail, the converter circuit provides its low voltage from its battery to maintain the discharge. If the mains fails while the light is switched off, the converter circuit strikes and then maintains the discharge in the light.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: December 12, 1989
    Assignee: Fano International Limited
    Inventors: Wouter Kraaij, Meindert Visser