Patents by Inventor Atsushi Ishikawa

Atsushi Ishikawa 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: 5838833
    Abstract: Image compression is accomplished by dividing an image into blocks which are encoded and compressed by finding similarities among the blocks. Image quality and speed are increased through several mechanisms such as varying the size of the blocks when image edges or test is present, by comparing the image blocks to prestored image patterns rather than other portions of the image, using raw data rather than compressed data under certain conditions and the use of inspection areas to increase the possibility of finding the most similar area quickly.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: November 17, 1998
    Assignee: Minolta Co., Ltd.
    Inventors: Atsushi Ishikawa, Tetsuya Itoh
  • Patent number: 5722669
    Abstract: The invention relates to a CVJ boot in which contact pressure of crest portions closer to a large-diameter mounting portion on the compressed side of a bellows portion is reduced when slant faces forming a root portion of a bending point obtained by the S-shaped bend come into contact with each other, thereby increasing durability.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: March 3, 1998
    Assignee: Keeper Co., Ltd.
    Inventors: Minoru Shimizu, Yasuyuki Matsuura, Atsushi Ishikawa, Shinji Nomura
  • Patent number: 5608547
    Abstract: In a shadow process mode, a scanner reads out an original with a first exposure lamp in a first scanning operation. The readout image data is stored in an image memory via an I/O control unit. In the second scanning operation, the scanner reads out the original with a second exposure lamp having an illumination direction different from that of the first exposure lamp. The image data read out in the second scanning operation and the data stored in the image memory are subtracted for each pixel by a subtractor. The difference thereof is compared with a predetermined value in a comparator. The compared result is output to a selector, whereby a desired image data is provided to a printer processing unit via the I/O control unit.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: March 4, 1997
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Munehiro Nakatani, Yoshikazu Ikenoue, Atsushi Ishikawa, Akio Nakajima, Hideo Kumashiro, Katsuaki Tajima, Tetsuya Itoh, Keiji Nakatani, Sou Hirota
  • Patent number: 5560977
    Abstract: An object of the present invention is to offer a magnetic recording medium comprising a substrate and a magnetic film formed on the substrate, wherein the substrate is formed using a conductive material and a surface of said substrate is processed by electroetching. As this magnetic recording medium has excellent surface characteristics, excellent durability and small spacing loss, its recording and play back characteristics are excellent.
    Type: Grant
    Filed: June 17, 1994
    Date of Patent: October 1, 1996
    Assignee: Kao Corporation
    Inventors: Yuzo Yamamoto, Atsushi Ishikawa, Michihide Yamauchi
  • Patent number: 5540577
    Abstract: In an injection molding machine which comprises a mold composed of a fixed mold attached to a fixed platen and a movable mold attached to a movable platen, and a driving source for driving the movable platen to open and close the mold, a distance sensor detects, as a platen interval, a distance between two positions preliminarily selected on the fixed platen and the movable platen and produces a distance detection signal. A pressure sensor detects a clamping pressure applied by the driving source and produces a pressure detection signal. A control unit controls the driving source to adjust the platen interval and the clamping pressure through a plurality of steps in response to the distance detection signal and the pressure detection signal.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: July 30, 1996
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Atsushi Ishikawa, Yoshiyuki Imatomi, Kazuo Hiraoka, Yoshihiko Nagata, Hitoshi Hara
  • Patent number: 5387109
    Abstract: Disclosed are a novel fructosylamine deglycase characterized by the specificity to amadori compounds of catalyzing oxidation of the compounds to produce an .alpha.-ketoaldehyde, an amine derivative and hydrogen peroxide; a method of producing the novel enzyme by cultivating microorganisms belonging to the genus Candida and having an ability of producing the novel enzyme; and a method of quantitative determination of amadori compounds by applying the novel enzyme to a sample containing amadori compounds to measure the amount of the hydrogen peroxide to be formed by the oxidation reaction or measure the amount of the oxygen to be consumed by the reaction to thereby obtain the amount of the amadori compounds from the measured value. The invention provides a novel enzyme characterized by the high specificity to the reaction with amadori compounds, especially that having therein a saccharide moiety as bonded to the .epsilon.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: February 7, 1995
    Assignee: Nakano Vinegar Co., Ltd.
    Inventors: Atsushi Ishikawa, Yoshifumi Ohshima, Mikio Yamada, Hajime Okumura, Yoshiya Kawamura
  • Patent number: 5162962
    Abstract: This invention relates to a magnetic recording apparatus which includes a magnetic head and device for moving a magnetic recording medium with respect to the magnetic head and makes recording to and reproduction from the magnetic recording medium, comprising a sliding member which comes into sliding contact with a magnetic recording medium made of a composite material containing glass-like carbon and at least one inorganic compound selected from the group consisting of metal oxides, metal nitrides, metal carbides and metal borides so that the sliding characteristics with respect to the medium can be improved and the recording/reproduction characteristics can be kept stable for a long period of time without damaging the medium due to reduced frictional resistance.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: November 10, 1992
    Assignee: Kao Corporation
    Inventors: Michihide Yamauchi, Nobunori Ooji, Atsushi Ishikawa, Masanobu Wakasa
  • Patent number: 4958998
    Abstract: The present invention provides a glasslike carbon composite material which has reduced surface friction and excellent wear resistance and durability, because of the addition of specific ultrafine ceramic particles as a reinforcing material to a main component of glasslike carbon. The present invention further provides a method for preparing such a glasslike carbon composite material, as well as a method for preparing a glasslike carbon material.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: September 25, 1990
    Assignee: Kao Corporation
    Inventors: Michihide Yamauchi, Hiroyuki Nagamori, Masanobu Wakasa, Atsushi Ishikawa