Patents by Inventor Philip Hwang

Philip Hwang 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).

  • Portable type of foldable luggage cart
    Patent number: 4619464
    Abstract: A portable and foldable luggage cart having a pair of track rods, casters on the rods, vertical rods pivotally attached to the ends of the track rods and a handle pivotally attached to the free end of one vertical rod and attached by a slot to the other vertical rod, the pivotal attachment of the rods including a U-shaped portion having an end wall, two pins and a spring, the spring urging the end of the vertical rods into engagement with the end walls when the cart is folded and into engagement with one of the pins when the cart is unfolded.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: October 28, 1986
    Inventor: Philip Hwang
  • Flashlight
    Patent number: D375569
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: November 12, 1996
    Assignee: Freezinhot Enterprise Co., Ltd.
    Inventor: Philip Hwang