Patents by Inventor Paul Yao-Cheung Wang

Paul Yao-Cheung Wang 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).

  • Implant preparations containing bioactive macromolecule for sustained delivery
    Patent number: 5939380
    Abstract: Implant preparations capable of sustained action when inserted are comprised of powder of a natural lipoidal substance in thorough admixture with bioactive macromolecule, followed by compression under pressure into a disc or rod that can be broken and used in small pieces as well.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: August 17, 1999
    Inventor: Paul Yao-Cheung Wang