Patents by Inventor Tu David Heng-Wei

Tu David Heng-Wei 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).

  • Liquid oil lamps
    Patent number: 7303390
    Abstract: A liquid fuel lamp is provided with a wick carrying composite safety cap which is mountable to and removable from the liquid fuel container only by simultaneous pressing and turning actions. The safety cap has a spring biassed latch and a wick guard surrounding in a spaced manner around the upper end portion of the wick.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: December 4, 2007
    Inventor: Tu David Heng-Wei