Patents by Inventor Ernst Schar

Ernst Schar 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).

  • Floor cleaning device
    Patent number: 4293973
    Abstract: A matted fleece cleaning pad is supported on a number of spread-out tufts of bristles set in cavities of a holding plate, the bristles of each tuft being of different length and made of a synthetic plastic, preferably a polyamide. By this arrangement, the cleaning pad can be held springily, so that it can follow irregularities in the floor. The longer bristles are beaded at their ends by singeing, so that the cleaning pad does not fall off when the holding plate is lifted up from the floor.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: October 13, 1981
    Inventor: Ernst Schar