Patents by Inventor Tao-Ping Chang

Tao-Ping Chang 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).

  • Patent number: 5103810
    Abstract: A sexual aid has a tubular body with a connection piece, two bands sewn or adhered to a lower end of the connection piece and a guard sewn to an upper end of the connection piece. For adjustment of the tightness of the device, a waistband adhered to the guard by adhesive tapes defines slots through which pass ends of the two bands. The tubular body has a number of peaks and valleys running along spiral lines which, with a ring element, stimulate the woman in order to make her reach orgasmic phase more quickly. The tubular body is a hollow structure with a hole at the front end to allow sperm to flow therethrough.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: April 14, 1992
    Inventor: Tao-Ping Chang