Patents by Inventor Woon Sik Cho

Woon Sik Cho 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).

  • Integrated safety control system for user's gas facility and gas leakage recognizing method
    Patent number: 5908980
    Abstract: An integrated safety control system comprises a controller unit, driver unit, first transmitter/receiver unit, and a second transmitter/receiver unit. The controller unit outputs control signals respectively based on input signals received thereto to control the entire system. The driver unit drives the entire system in accordance in accordance with the control signals from the controller unit. The first transmitter/receiver unit is equipped in the driver unit and is serving to receive the control signals from the controller unit and to transmit data from the driver unit to the controller unit. The second transmitter/receiver is equipped in the controller unit and is serving to transmit the controls signals from the controller unit to the driver unit and to receive data transmitted from the driver unit.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: June 1, 1999
    Assignee: Tae Gu City Gas Co. Ltd
    Inventors: Jung Hoon Hwang, Ho Young Song, Woon Sik Cho, Sang Woo Lee