Patents by Inventor Zhi-Cong Liu

Zhi-Cong Liu 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).

  • Emergency light device
    Publication number: 20030034886
    Abstract: An emergency light device includes a casing having a circuit board which includes a light circuit and a detection circuit. The light circuit has an re-chargeable circuit and a starting circuit which is connected to a bulb so that the bulb lights up when the electric power is out. The detection circuit has a control IC, vibration sensor, a smoke detection device and a siren. The siren horns and the bulb lights up when the vibration sensor or the siren smoke detection device are activated.
    Type: Application
    Filed: August 16, 2001
    Publication date: February 20, 2003
    Inventor: Zhi-Cong Liu