Patents by Inventor Hilbert H. M. Ng

Hilbert H. M. Ng 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).

  • Hair coloring apparatus and method
    Patent number: 5146936
    Abstract: A hair coloring apparatus (10) with a row of teeth members (14) and a plurality of applicator brushes (16) mounted for movement between an ingredient load position in which the application brushes are spaced from the row (14) of teeth (14), for immersion into a supply of coloring ingredient, to an application position in which the brushes are located between individual, selected pairs of adjacent teeth members (14) for coloring strands of hair which pass between only the selected pairs of teeth members (14) with loaded applicator members (16) located therebetween.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: September 15, 1992
    Assignee: Charlene Products, Inc.
    Inventor: Hilbert H. M. Ng