Patents by Inventor Yuzo Kato

Yuzo Kato 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: 4317784
    Abstract: An adjust screw device for use with a carburetor of an internal combustion engine having stops for restricting the range within which the automobile user can readjust the idle R.P.M. by adjusting the adjust screw at the carburetor. The adjust screw device is composed majorly of a first adjust screw having a large adjustable range and a second adjust screw for fine adjustment, the physical position of the second adjust screw being changed by the adjustment of the first adjust screw. After initial adjustment of the first adjust screw by the manufacturer, further adjustment of the screw is completely blocked and the second adjust screw is then adjustable by the user only over a predetermined range.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: March 2, 1982
    Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Aisan Kogyo Kabushiki Kaisha
    Inventors: Yuzo Kato, Hidenori Tateno, Mikitoshi Kako
  • Patent number: 4315201
    Abstract: An alignment apparatus for mask and wafer each having alignment marks provided in a narrow strip like area between circuit patterns is disclosed, which mask and wafer are used in manufacturing semiconductor circuit elements. In the apparatus, the mask and wafer are scanned to obtain scan signals by means of which the amount of relative deviation between the alignment marks on mask and wafer is detected. By means of the detected signal, an alignment is effected between the mask and wafer in the apparatus. For this type of alignment apparatus, there is a problem that since the alignment marks are provided in the narrow strip like area, no coincidence between the scanning position and the strip area is attainable with pre-alignment accuracy. Improvement in the alignment apparatus according to the invention lies in that a reading of alignment marks is initiated after the coincidence is photoelectrically detected.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: February 9, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiyoshi Suzuki, Ryozo Hiraga, Ichiro Kano, Hideki Yoshinari, Masao Totsuka, Yuzo Kato, Yasuo Ogino
  • Patent number: 4278893
    Abstract: An alignment apparatus by which two points on a first standard line on a first workpiece may be aligned in two regions having as the centers two standard points on a second standard line on a second workpiece optically opposed to the first workpiece and having predetermined areas. The two regions are diamond-shaped. By this, it is possible to reduce the alignment error of the first and second workpieces.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: July 14, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuzo Kato, Yasuo Ogino, Ryozo Hiraga, Hideki Yoshinari, Masao Tozuka, Ichiro Kano, Akiyoshi Suzuki
  • Patent number: 4275306
    Abstract: An alignment apparatus in which alignment marks on a mask and a wafer for producing a semiconductor circuit element are photoelectrically read and the positional deviation between the two alignment marks is detected and one of the mask and the wafer is parallel-moved in accordance with the detected amount to align the mask and wafer into a predetermined positional relation. This apparatus has the function of correcting any interval error which may be present between the alignment marks.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: June 23, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuzo Kato, Yasuo Ogino, Ryozo Hiraga, Hideki Yoshinari, Masao Tozuka, Ichiro Kano
  • Patent number: 4262208
    Abstract: This invention relates to a photo-electrical detecting apparatus for forming a dark-field image of an object on a one-dimensional image sensor and reading said image photo-electrically. The apparatus includes a telecentric objective lens, and a light source image is formed on the clear aperture plane of said lens, said image being in focus in a direction on said plane and out of focus in a perpendicular direction. A line- or band-shaped area of the object is illuminated by the light from said light source image. Thus a dark-field image of the object is formed on said one-dimensional image sensor by providing, on a plane equivalent to said aperture plane, a filter which intercepts the normal reflected light from said object and transmits the scattered light therefrom.
    Type: Grant
    Filed: June 19, 1979
    Date of Patent: April 14, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiyoshi Suzki, Ichiro Kano, Hideki Yoshinari, Masao Tozuka, Ryozo Hiraga, Yuzo Kato, Yasuo Ogino
  • Patent number: 4229768
    Abstract: In the transmission of binary image signals obtained by scanning of an original document, a high signal compression ratio without deterioration in image quality is achieved by subjecting the binary image signals to a selective thinning process in which the signals of a run-length within a determined range are converted into signals of a determined length and by subsequently coding thus selectively thinned signals. A further improved signal compression is also established without deterioration of image quality by conducting, prior to the selective thinning process, preliminary processes such as elimination of isolated dots in the image or smoothing in the principal and auxiliary scanning directions.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: October 21, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Sadasuke Kurahayashi, Yuzo Kato, Asao Watanabe, Shin Tsuda, Hakaru Muto
  • Patent number: 4202627
    Abstract: An improved photoelectric detecting apparatus is disclosed in which a subject surface containing a pattern which diffracts light in a predetermined direction is scanned with spotlight and the diffracted light coming from the pattern is detected by means of photoelectric element so as to read out information of the pattern. The apparatus comprises a first photoelectric element for detecting the light diffracted in the predetermined direction, a second photoelectric element adapted for detecting light diffracted in directions other than the predetermined direction and an operational circuit for operating the signal derived from the first photoelectric element and that derived from the second one. Thus, when there is any diffractive matter such as flaw, dust and the like on the subject surface, diffracted light from the diffractive matter is detected by both the first and second photoelectric elements whereas diffracted light from the pattern is detected only by the first photoelectric element.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: May 13, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akiyoshi Suzki, Ichiro Kano, Hideki Yoshinari, Masao Tozuka, Ryozo Hiraga, Yuzo Kato, Yasuo Ogino
  • Patent number: 4193097
    Abstract: This invention relates to the reduction in time required for signal transmission in facsimile apparatus, and consists of a transmitting apparatus adapted for eliminating the signal indicating the line thickness from the binary image signal obtained by scanning the original to be transmitted and transmitting thus obtained band-compressed transmission signal, and a receiving apparatus adapted for adding a signal approximately equal to the above-mentioned signal indicating the line thickness to the above-mentioned transmission signal thereby forming received image.
    Type: Grant
    Filed: April 25, 1978
    Date of Patent: March 11, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Sadasuke Kurahayashi, Yuzo Kato, Shin Tsuda, Hakaru Muto, Asao Watanabe
  • Patent number: 4173958
    Abstract: A carburetor in a fuel system in a motor vehicle including a fuel tank, a fuel pump for delivering fuel from the fuel tank to the carburetor under pressure and the return line which returns fuel from the carburetor to the fuel tank when an excess amount of fuel is delivered to the carburetor by the fuel pump. The carburetor further includes a check valve means in the return line for preventing the flow of fuel in the return line in a direction from the fuel tank to the carburetor whereby leaking out of fuel from the carburetor of fuel flowing backwards through the return line is prevented when the vehicle is turned upside down in an accident.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: November 13, 1979
    Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Aisan Kogyo Kabushiki Kaisha
    Inventors: Yuzo Kato, Akira Ii, Tetsuya Oniki