Patents by Inventor Wang C. Han

Wang C. Han 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).

  • Multiple disposable plastic bag assembly
    Patent number: 4978231
    Abstract: A multiple disposable plastic bag assembly comprised of multiple disposable plastic bags nested one within another to form a bag assembly, characterized in that sticking elements are made on the circular top edge of the opening of the bag body for sticking of the bag assembly to a wastebin to allow the disposable plastic bag assembly to be torn up consecutively bag by bag so as to minimize time consumption in placing individual bags in a wastebin and to facilitate packing up garbage within a bag of the assembly.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: December 18, 1990
    Inventors: Zhang A. Ling, Wang C. Han