Patents by Inventor Ralph William Holloway

Ralph William Holloway 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).

  • Toothbrush crimped contour filament
    Patent number: 5873140
    Abstract: A toothbrush for simultaneously brushing a plurality of tooth surfaces, outer inner and crown portions comprising a one head construction with anchored filaments arranged in bundles of bristles forming four longitudinal rows, the exterior angled facing inwards the two interior rows upright. By not being encircled by exterior filaments the top brushing surface remains concave.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: February 23, 1999
    Assignee: Ralph Holloway
    Inventor: Ralph William Holloway