Patents by Inventor Zhihong Mao

Zhihong Mao 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).

  • MEASUREMENT OF ANALOG COIL VOLTAGE AND COIL CURRENT
    Publication number: 20080156791
    Abstract: The measurement of analog coil voltage and coil current during the energizing of the circuit breaker coil that is connected to the output contact of a protective circuit breaker relay in order to detect an incipient failure of the circuit breaker mechanism
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Dale Finney, Adil Jaffer, Zhihong Mao, William Premerlani, Mark Adamiak
  • METHOD AND APPARATUS FOR RECOGNIZING A CHANGE-OF-STATE IN COMMUNICATION SIGNALS OF ELECTRONIC CIRCUITS
    Publication number: 20080159440
    Abstract: A method for recognizing a valid change of state in a communication signal including capacitively coupled signals received by an input contact includes maintaining the input contact in a first state and an impedance of the first contact input in a first impedance level, validating that the communication signal sent from to the input contact is a valid change of state, and changing the input contact to a second state and the impedance of the first input contact input to a second impedance level when the voltage signal is validated. An input contact circuit is also disclosed.
    Type: Application
    Filed: December 28, 2006
    Publication date: July 3, 2008
    Inventors: Adil Jaffer, Dale Finney, Zhihong Mao