Patents by Inventor Boon Su Chan

Boon Su Chan 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: 5522109
    Abstract: A toothbrush comprises an elongate element with a brushhead on each end. The elongate element (10) is composed of a first curved portion (10a, 10b) on one end and a corresponding second curved portion (10b, 10a) on the other end. Each curved portion further comprises an outer section (14) and a holder section (12) integrally connected by a goose-neck shaped middle section (13), with the brushhead attached to the free end of the outer section such that the longitudinal axis of the brushhead (20, 30) is disposed at an angle to the longitudinal axis of the adjacent outer section (14) of the element (10). The toothbrush is pivotally fitted with a rotatable cover-cum-handle that allows either brushhead-carrying curved portion (10a, 10b) of the elongate element to be exposed and concealed in turn.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: June 4, 1996
    Inventor: Boon Su Chan