Patents by Inventor Liquan DONG

Liquan DONG 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).

  • Rigid endoscope
    Patent number: 10653302
    Abstract: A rigid endoscope includes an endoscope tube, a light-emitting diode (LED) chip, an objective lens group, a rod lens group and a lead. the objective lens group and the rod lens group are disposed in the endoscope tube and arranged in a direction from a front end to a rear end of the endoscope tube; the LED chip is mounted at the front end of the endoscope tube; and the lead is led out from the LED chip, runs through a gap between an inner circle of the endoscope tube and an outer circle of the objective lens group, and arrives at the rear end of the endoscope tube.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: May 19, 2020
    Assignee: BEIJING WESTON ASIA-PACIFIC OPTO-ELECTRIC INSTRUMENT CO., LTD.
    Inventors: Xiaohua Liu, Ye Yuan, Dewen Cheng, Liquan Dong, Xiatian Wang
  • RIGID ENDOSCOPE
    Publication number: 20180206702
    Abstract: A rigid endoscope includes an endoscope tube, a light-emitting diode (LED) chip, an objective lens group, a rod lens group and a lead. the objective lens group and the rod lens group are disposed in the endoscope tube and arranged in a direction from a front end to a rear end of the endoscope tube; the LED chip is mounted at the front end of the endoscope tube; and the lead is led out from the LED chip, runs through a gap between an inner circle of the endoscope tube and an outer circle of the objective lens group, and arrives at the rear end of the endoscope tube.
    Type: Application
    Filed: September 23, 2015
    Publication date: July 26, 2018
    Inventors: Xiaohua LIU, Ye YUAN, Dewen CHENG, Liquan DONG, Xiatian WANG