Patents by Inventor Pei Zhi Huang

Pei Zhi Huang 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).

  • Flexible toothbrush
    Patent number: 5694658
    Abstract: A flexible toothbrush comprises a head portion, a neck portion and a handle portion. The head portion is integrally formed with the neck portion such that it is at an angle of approximately 0.degree. to 20.degree.. The neck potion has a hollow chamber, where a leaf-spring is embedded within the hollow chamber and is bendable for providing flexibility on the neck portion for enhancing the brushing of an individual's teeth.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: December 9, 1997
    Assignee: Natural Sparkle IM/EX Co. Ltd.
    Inventors: Pei Zhi Huang, Jian Zhi Wu, Rui Qing Lai