Patents by Inventor Roswitha Ronkholz-Tolle, nee Tolle

Roswitha Ronkholz-Tolle, nee Tolle 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).

  • Slatted curtain
    Patent number: 3946789
    Abstract: A slatted curtain having covering slats and transparent slats arranged so that when the curtain is open each two adjacent covering slats form two sides of an H, while the transparent slat between them forms the crosspiece of the H.
    Type: Grant
    Filed: August 2, 1974
    Date of Patent: March 30, 1976
    Inventor: Roswitha Ronkholz-Tolle, nee Tolle