Patents by Inventor Karen Ka Yan LIU

Karen Ka Yan LIU 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).

  • ROOFTOP STORMWATER MANAGEMENT APPARATUS AND METHOD
    Publication number: 20200095770
    Abstract: A stormwater management apparatus and method including a water storage component, and a drainage component. The water storage component, and protective component form a composite that allows for stormwater to be retained to an appropriate extent, and for excess stormwater to be adequately controlled. The water storage component and drainage component are provided in a single unit.
    Type: Application
    Filed: September 17, 2019
    Publication date: March 26, 2020
    Applicants: LOW & BONAR INC., BONAR XEROFLOR GMBH
    Inventors: Lori HASCHER, Karen Ka Yan LIU, Allan WINGFIELD