Patents by Inventor Ping Ko

Ping Ko 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).

  • Radio Frequency Identification (RFID) system
    Publication number: 20060261938
    Abstract: A group of technologies related to RFID reader and tag are described, including: redundant networked multimedia RFID reader, auto-ranging RFID reader, auto-planning RFID reader, smart active antenna RFID reader and novel RFID tags. These enabling technologies bring RFID reader operations into a new level of automation, capability and ease of implementation.
    Type: Application
    Filed: June 16, 2005
    Publication date: November 23, 2006
    Inventors: Kin Lai, On Wong, Tak Wan, Hon Wong, Ngai Tsang, Pak Ma, Ping Ko, Chi Cheung
  • Dual-emitter lateral magnetometer
    Patent number: 5514899
    Abstract: A magnetometer or magnetic field sensor includes semiconductor material deposited laterally on an insulating substrate. The semiconductor material is alternating regions of n- and p-type silicon provided with two cathodes, an anode and a triggering node. Upon application of a triggering pulse to a switch on the sensor, a carrier domain is formed. In the presence of a magnetic field this carrier domain is deflected to one side thus causing an imbalance in the current collected at the two cathodes.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: May 7, 1996
    Assignees: Hong Kong University of Science and Technology, R and D Corporation Limited
    Inventors: Jack Lau, Christopher C. T. Nguyen, Ping Ko, Philip C. Chan