Patents by Inventor Ulisses G. Romao

Ulisses G. Romao 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).

  • Patent number: 5749443
    Abstract: A security system for an elevator is disclosed that secures access to a landing by having the resident use a transmitter identifying the secured landing. In a building having a plurality of secured landings, the transmitter provides access to only one of the secured landings by emitting a signal that identifies only that secured landing. The emitted signal is received by a receiver and sent to a controller of the elevator system. In a particular embodiment, the elevator system includes a plurality of common landings and a plurality of private landings. Each transmitter provides access to all the common landings and only the particular private landing that corresponds to that transmitter.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: May 12, 1998
    Assignee: Otis Elevator Company
    Inventor: Ulisses G. Romao