Patents by Inventor Stephen R. Butterfield

Stephen R. Butterfield 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: 5754750
    Abstract: An apparatus and method used to perform image rendering is capable of producing complex, high resolution images for a continuous synchronous raster image output device, such as a laser printer or a video display, using a minimum of random access memory. High level graphics instructions defining an image to be displayed or printed are provided by a processor executing an applications program. These instructions are interpreted to generate a set of graphics orders that are subsequently processed to create a bitmap image for output to a display or printer device. The graphics order processing system is independent of the central processor and thereby significantly reduces the central processor's image output overhead.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: May 19, 1998
    Assignee: Peerless Systems Corporation
    Inventors: Stephen R. Butterfield, Donald E. Phillips, Barbara B. Renshaw, Steven K. Nelson, Robert F. Hossley
  • Patent number: 5748986
    Abstract: An apparatus and method used to perform image rendering in a manner which is capable of producing complex, high resolution page images where a continuous synchronous raster image output device, such as a laser printer, using a minimum of random access memory. The invented technique decomposes basic graphics functions into a compact series of orders commands suitable for real time processing and then generates the output page image in real time. The graphic content of a page is defined in much less memory then the rendered image would otherwise require, but is in a form that can be processed and deliver to the output device at the speed required by the output device. This is accomplished by the use of graphics functions which are represented as low level primitives which can be converted to bit mapped images in real time.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: May 5, 1998
    Assignee: Peerless Systems Corporation
    Inventors: Stephen R. Butterfield, Donald E. Phillips, Barbara B. Renshaw, Steven K. Nelson, Robert F. Hossley
  • Patent number: 5509115
    Abstract: An apparatus and method used to perform image rendering is capable of producing complex, high resolution images for a continuous synchronous raster image output device, such as a laser printer or a video display, using a minimum of random access memory. High level graphics instructions defining an image to be displayed or printed are provided by a processor executing an applications program. These instructions are interpreted to generate a set of graphics orders that are subsequently processed to create a bitmap image for output to a display or printer device. The graphics order processing system is independent of the central processor and thereby significantly reduces the central processor's image output overhead.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: April 16, 1996
    Assignee: Peerless Systems Corporation
    Inventors: Stephen R. Butterfield, Donald E. Phillips, Barbara B. Renshaw, Steven K. Nelson, Robert F. Hossley
  • Patent number: 5502804
    Abstract: An apparatus and method used to perform image rendering in a manner which is capable of producing complex, high resolution page images where a continuous synchronous raster image output device, such as a laser printer, using a minimum of random access memory. The invented technique decomposes basic graphics functions into a compact series of orders commands suitable for real time processing and then generates the output page image in real time. The graphic content of a page is defined in much less memory then the rendered image would otherwise require, but is in a form that can be processed and deliver to the output device at the speed required by the output device. This is accomplished by the use of graphics functions which are represented as low level primitives which can be converted to bit mapped images in real time.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: March 26, 1996
    Assignee: Peerless Systems Corporation
    Inventors: Stephen R. Butterfield, Donald E. Phillips, Barbara B. Renshaw, Steven K. Nelson, Robert F. Hossley