Patents by Inventor Steffen Strunk

Steffen Strunk 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).

  • Operating method for the operation of a revolving door
    Patent number: 5647173
    Abstract: An operating method for a revolving door in which the peripheral velocity of the panels of the revolving door consists of a booster component provided by a drive motor and a force which must be applied to at least one of the panels of the revolving door.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: July 15, 1997
    Assignee: Dorma GmbH + Co. KG
    Inventors: Jurgen Stark, Steffen Strunk