Patents by Inventor Hiroyuki Sekiguchi

Hiroyuki Sekiguchi 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).

  • Positioning control system
    Patent number: 5663622
    Abstract: A positioning control system for positioning a movement member with respect to a predetermined position on the basis of feedback control of a driving system for the movement member, includes an extraordinary movement detecting device for detecting extraordinary movement of the movement member, and an emergency stoppage servo device for applying a signal for stopping the driving system in response to output of a detection signal from the extraordinary movement detecting device.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: September 2, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Sekiguchi
  • Method of and apparatus for region extraction in three-dimensional voxel data
    Patent number: 5553207
    Abstract: In a region extraction to be achieved by a concatenated region expansion processing, to improve reliability of extraction results and to reduce loads imposed on the operator, when a region other than an objective region is extracted as a result of the region extraction, a point belonging to the region other than the objective region is specified in a three-dimensional display image to execute deletion of the overflow region.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: September 3, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Sekiguchi, Koichi Sano, Tetsuo Yokoyama
  • Region extracting method and three-dimensional display method
    Patent number: 5319551
    Abstract: In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability, a region expansion method is applied by using a combination of an expansion condition taking the local density change into consideration and an expansion condition taking the global density change into consideration.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: June 7, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Sekiguchi, Koichi Sano, Tetsuo Yokoyama
  • Process for producing pitch-type carbon fibers
    Patent number: 4923692
    Abstract: A process for producing pitch-type carbon fibers, which comprises melt-spinning pitch material in a gaseous atmosphere to form pitch fibers, gathering the pitch fibers in the presence of an oiling agent into a tow, followed by infusible treatment, carbonization treatment and, if necessary, graphitization treatment, of the tow of pitch fibers, characterized in that the tow of pitch fibers is brought in contact with a washing liquid to wash the surface of the pitch fibers prior to the infusible treatment.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: May 8, 1990
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Akira Nakagoshi, Hiroshi Tahara, Tetuo Yamada, Hiroyuki Sekiguchi, Hidemi Murata