Patents by Inventor Pei-Chen Wen

Pei-Chen Wen 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).

  • Filter device
    Patent number: 7738199
    Abstract: A filter device has a frame, an optical filter, two magnetic members and two covers. The frame has a window and two rails attached to the opposite sides of the window. Each rail has two coil holding portions. The optical filter is able to slide between the rails and has at least one lens and two holders holding the magnetic members. The covers hold the optical filter between the rails. Thus the filter device is able to prevent the coils from wear-out failures with a simple and enduring structure.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: June 15, 2010
    Assignee: Taiwan Straight Forward 100 Co., Ltd.
    Inventor: Pei-Chen Wen