Patents by Inventor Koichi Kitamura

Koichi Kitamura 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).

  • Contact type image sensor device with specific capacitance ratio
    Patent number: 5004903
    Abstract: A contact type image sensor device comprises a plurality of photodiodes connected in a matrix, and an equal number of blocking diodes. A capacity ratio of a photo electric part constituting the photodiodes to a diode part constituting the blocking diode is in the range of 2:1 to 30:1. Dynamic range, magnitude of the signal current, light sensitivity and after image characteristics of the image sensor are improved according to the invention.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: April 2, 1991
    Assignee: Nippon Steel Corporation
    Inventors: Koichi Kitamura, Hidenori Mimura, Kazuo Yamamoto, Yasumitsu Ohta, Kazuyoshi Sai
  • Amino acid derivatives having anti-tumor activity and compositions containing them
    Patent number: 4904680
    Abstract: Amino acid amides of formula (I): ##STR1## wherein R.sup.1 -R.sup.5 and Y represent a variety of organic groups and atoms (including where R.sup.2, Y and the adjacent nitrogen atom together represent a thiazolidine or pyrrolidine group) and X represents carbonyl or sulfonyl are mostly new compounds and have valuable anti-tumor and immuno-regulatory activities. They may be formulated in compositions for pharmaceutical use.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: February 27, 1990
    Assignee: Sankyo Company, Limited
    Inventors: Takashi Matsui, Mitsuo Nagano, Koichi Kitamura, Fusaaki Shimizu
  • Photosensitive pixel with exposed blocking element
    Patent number: 4746804
    Abstract: By maintaining the first electrodes of a photogenerative element and a current blocking element at a common potential while electrically interconnecting the second electrodes thereof, the blocking element need not be masked from incident radiation because the stored electrical signal generated by the photogenerative element will not be dissipated by photogenerated carrier pairs contributed by the current blocking element.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: May 24, 1988
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Koichi Kitamura, Louis D. Swartz, Clive Catchpole, Zvi Yaniv
  • Photosensitive pixel with exposed blocking element
    Patent number: 4714836
    Abstract: By maintaining the first electrodes of a photogenerative element and a current blocking element at a common potential while electrically interconnecting the second electrodes thereof, the blocking element need not be masked from incident radiation because the stored electrical signal generated by the photogenerative element will not be dissipated by photogenerated carrier pairs contributed by the current blocking element.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: December 22, 1987
    Assignee: Ovonic Imaging Systems, Inc.
    Inventors: Koichi Kitamura, Louis D. Swartz, Clive Catchpole, Zvi Yaniv
  • Method for measurement of distribution of inclusions in a slab by electron beam irradiation
    Patent number: 4331872
    Abstract: In a method for the measurement of the distribution of the inclusions in a slab by electron beam irradiation, an electron beam of relatively large diameter is irradiated onto a relatively large specimen of the slab and a spectrum analysis of the characteristic X-rays is effected by using planar analyzing crystals, in order to obtain the data of the two-dimensional distribution of the elements of the inclusions in the surface of the specimen.
    Type: Grant
    Filed: June 17, 1980
    Date of Patent: May 25, 1982
    Assignees: Nippon Steel Corporation, Kabushiki Kaisha Daini Seikosha
    Inventors: Hiromu Soga, Koichi Kitamura, Tomio Sasaki, Mitsuyoshi Sato, Hiroshi Ishijima