Patents Assigned to G.R.P. Gesellschaft fur Rationelle Psychologie oHG
  • Toothbrush
    Patent number: 4274174
    Abstract: A toothbrush having a conically tapering stem-like grip with an essentially circular cross-section, whereby the bristle carrier, which is rounded on its back, extends toward the center axis at an angle between about 25.degree. to about 35.degree.. In the bend region the grip tapers conically to form a rear-side depression. A short bristle zone is disposed in the front portion of the bristle carrier and is directed toward the center axis of the grip.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: June 23, 1981
    Assignee: G.R.P. Gesellschaft fur Rationelle Psychologie oHG
    Inventor: Ulrike Ertel