Patents by Inventor Oskar Heumann

Oskar Heumann 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
    Patent number: 4152806
    Abstract: A toothbrush with means for adjustment of the bristle length including a moveable slotted or perforated plate arranged over the bristle holder and with bristles passing through the slots or perforations said plate being movable up and down the bristle length by means of a slide mechanism or a screw connection.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: May 8, 1979
    Assignee: Blendax-Werke R. Schneider GmbH & Co.
    Inventors: Helmut Raaf, Oskar Heumann
  • Adjustable bristle toothbrush
    Patent number: 4149293
    Abstract: A toothbrush with a variable adjustment of the operative bristle length, characterized in that it is equipped with a movable perforated plate, arranged over the bristle holder with the bristles extending through the perforations. The plate is adjustable up and down by means of a seesaw or scissor-like mechanism.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: April 17, 1979
    Assignee: Blendax-Werke R. Schneider & Co.
    Inventors: Helmut Raaf, Oskar Heumann