Patents Examined by Katherine S Mitchell
  • Window blind device
    Patent number: 9874057
    Abstract: A window blind device includes a headrail, a bottomrail, a window shade, first and second control wheels, first and second cord spools, first and second cords, and a coil spring. The coil spring has a looped end portion sleeved on a first wheel hub of the first control wheel, and a spring body wound on the first wheel hub and extending from the looped end portion to terminate at a leading spring end which is connected to a second wheel hub of the second control wheel.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: January 23, 2018
    Assignee: Taicang Kingfu Plastic Manufacture Co., Ltd.
    Inventor: Szu-Chang Huang