Patents by Inventor Stephen George Hopper

Stephen George Hopper 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).

  • Lifting system
    Patent number: 7509701
    Abstract: What is disclosed is a lifting apparatus, in particular a ferry landing stage, comprising a platform that is capable of being taken into a predetermined lift position with the aid of a hydraulic cylinder or of a cable winch. A safety stop by which the platform may be supported independently of the drive mechanism is associated to the drive mechanism.
    Type: Grant
    Filed: July 4, 2002
    Date of Patent: March 31, 2009
    Assignee: Bosch Rexroth AG
    Inventors: Erich Wirzberger, Stephen George Hopper