Patents by Inventor Norbert Bankstahl

Norbert Bankstahl 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).

  • Recessed valve
    Patent number: 4240462
    Abstract: A recessed valve includes a protective valve cover sleeve and an actuating spindle, wherein the sleeve is provided with spaced-apart circumferential notches which permit an installer to shorten the sleeve in steps. The spindle has similar notches which also permit shortening its length.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: December 23, 1980
    Assignee: Friedrich Grohe Armaturenfabrik GmbH & Co.
    Inventor: Norbert Bankstahl