Patents by Inventor Der-Shen Lai

Der-Shen Lai 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).

  • Warning and lighting flash light
    Patent number: 4984141
    Abstract: A warning & lighting flash light has a cylindrical tube, a rear lid and a front cap which can adjustably be rotated around the tube to move back and forth in such a distance to make the light of the lamp to be reflected forward by the mirror provided at the front cap to function as a lighting flash light or to shoot through the light passing portion covered with a filter to function as a warning one.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: January 8, 1991
    Assignee: Plum Industrial Co., Ltd.
    Inventors: Larry Lai, Zong-Syh Lai, Der-Shen Lai