Patents by Inventor Claes Ditlevsen

Claes Ditlevsen 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).

  • Insulator for fluorescent lamp
    Patent number: 5315211
    Abstract: An insulator is applied to the ends of a fluorescent lamp which operates in a cold environment. The insulator retains the heat generated by the fluorescent lamp in order to reduce the energy which must be applied to cause the lamp to fire.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: May 24, 1994
    Assignee: Anthony's Manufacturing Company, Inc.
    Inventors: Claes Ditlevsen, Dusan P. Pope, Artak Ter-Oganesian, Gary F. Paugh
  • Solid state ballast for fluorescent lamps
    Patent number: 5309066
    Abstract: A device to produce alternating electric current of high frequency for power consumers such as fluorescent lamps, which includes the means of supplying a DC voltage nearly twice the size of the peak voltage of the alternating voltage input--with negligible loss of power--to the remainder of the circuit and thus reducing the intrinsic power consumption of the device as well as making it possible to supply the said power consumer such as the fluorescent lamp with a higher start voltage as well as a higher voltage in operation.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: May 3, 1994
    Assignee: Jorck & Larsen A/S
    Inventor: Claes Ditlevsen