Patents by Inventor David J. Shields

David J. Shields 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).

  • Data stream protocol for immediate job switching
    Patent number: 5982997
    Abstract: A printing system wherein a first print driver utilizes an Intelligent Printer Data Stream (IPDS) to send a first job at a first font resolution to a printer and a second job at a second font resolution or a second job utilizing a non-IPDS data stream to the printer. A second print driver also utilizing the IPDS data stream is connected to the same printer for sending a third job. By sending a "Manage IPDS Dialog (MID)" IPDS command to the printer upon conclusion of the first job, the printer is enabled to switch immediately to the second job. The printer is enabled to switch between the first and second print drivers by use of the MID command at the conclusion of a print job.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: November 9, 1999
    Assignee: International Business Machines Inc.
    Inventors: David E. Stone, Reinhard H. Hohensee, David J. Shields