Patents by Inventor Joseph Karl Yap

Joseph Karl Yap 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).

  • Ejaculation aid and sperm collection device
    Patent number: 6113532
    Abstract: A multi-chambered balloon formed from a single rectangular plastic sheet, with an inflated shape approximating a vagina with adjustable tightness and a seamless opening. Manufacturing steps are minimized and simplified to one cutting operation, one valve insertion, and three seams. This minimizes cost, allowing a sex aid that is disposable for maximum cleanliness.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: September 5, 2000
    Inventor: Joseph Karl Yap