Patents by Inventor Steven E. Chen

Steven E. Chen 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).

  • Real-time image data access from virtual memory in a digital printing system
    Patent number: 5860143
    Abstract: In a real-time printing system, in which large blocks of digital data corresponding to page images must be located in a memory via a translation table and accessed from the memory within a very narrow time frame, the memory-management internal program of an operating system is overridden by external instructions which lock the translation table in memory.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: January 12, 1999
    Assignee: Xerox Corporation
    Inventors: David Plakosh, Juan A. Romano, Frederic J. Stann, Michael A. Wiegand, Norman E. Wright, Mark A. Smith, Steven E. Chen, Michael C. Lacagnina
  • Prioritized data transfer through buffer memory in a digital printing system
    Patent number: 5848226
    Abstract: A system for retrieving data representative of individual page images to be printed from a disk drive utilizes a priority system in which individual software entities within the printing apparatus compete for functional access to the hard-drive memory. Different elements, such as the decomposer, and other software entities within the control system are assigned priorities, and commands from the various elements and software entities are executed by the control system in order of the priority of their sources.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: December 8, 1998
    Assignee: Xerox Corporation
    Inventors: Steven E. Chen, Michael C. Lacagnina