Patents by Inventor Daniel J. Kleffner

Daniel J. Kleffner 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).

  • Electronic pricing display system
    Patent number: 4766295
    Abstract: An electronic pricing display system for displaying pricing and other specialized information in real time on shelf display tags (18). Display tags (18) are battery operated and receive remotely transmitted infrared signals from optical heads (20) mounted on the ceiling of a store. A handheld electronic controller (22) may be carried by store personnel for obtaining information from or sending information to a selected wireless display tag (18). Pricing information from a main computer (10) is connected by an electronic interface (23) including a microprocessor (24) into a serial information stream having two separate frequencies for relay to the optical heads (20).
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: August 23, 1988
    Assignee: H.E. Butt Grocery Company
    Inventors: Malcolm H. Davis, Kent A. Janes, Daniel J. Kleffner, William P. Seltzer, Hugh F. Spence