Patents by Inventor George L. Nyborg, Jr.

George L. Nyborg, Jr. 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).

  • Elevator door safety mechanism
    Patent number: 4228873
    Abstract: An elevator shaft door safety mechanism which permits the shaft door to be opened by authorized persons when the elevator is not in place. The mechanism is particularly suitable for use with doors of the hingedly mounted type. The mechanism is lock controlled and permits manual operation of the latching mechanism with the use of a special tool.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: October 21, 1980
    Assignee: Tri-County Elevator Co., Inc.
    Inventor: George L. Nyborg, Jr.