Patents by Inventor John P. Libera

John P. Libera 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).

  • Degaussing circuit
    Patent number: 6654224
    Abstract: An apparatus and method for degaussing a cathode ray tube including an alternating current (AC) source; a positive temperature coefficient (PTC) element; a resistance; a first switch coupled between said AC source and said PTC element in turn coupled to the resistance switching between a first position and a second position; a second switch coupled between the AC source and the PTC element switching between a first position and a second position; wherein in 110 volt operation, the first switch switched in a first position and the second switch switched in a second position; and conversely in 220 volt operation, the first switch switched in a second position and the second switch switched in a first position.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: November 25, 2003
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventor: John P. Libera
  • DEGAUSSING CIRCUIT
    Publication number: 20030137793
    Abstract: An apparatus and method for degaussing a cathode ray tube including an alternating current (AC) source; a positive temperature coefficient (PTC) element; a resistance; a first switch coupled between said AC source and said PTC element in turn coupled to the resistance switching between a first position and a second position; a second switch coupled between the AC source and the PTC element switching between a first position and a second position; wherein in 110 volt operation, the first switch switched in a first position and the second switch switched in a second position; and conversely in 220 volt operation, the first switch switched in a second position and the second switch switched in a first position.
    Type: Application
    Filed: January 18, 2002
    Publication date: July 24, 2003
    Applicant: Sony Corporation
    Inventor: John P. Libera