Patents by Inventor William B. Kiss

William B. Kiss 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).

  • Ringing generator
    Patent number: 4220826
    Abstract: A ringing signal supply for supplying ringing current to a telephone line with high efficiency and minimum distortion. As the ringing current demand of a load increases, distortion of the output signal is produced which causes an error signal to be generated after comparison of the output signal waveshape with a reference waveshape. The error signal is used to change the duty cycle of a pulse signal from which the output ringing signal is produced, thereby maintaining the proper output signal waveshape.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: September 2, 1980
    Assignee: Mitel Corporation
    Inventor: William B. Kiss