Patents by Inventor Tadao Saitoh

Tadao Saitoh 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: 5770001
    Abstract: An automatic assembly and inspection system for optical connectors is provided, which is highly reliable and which can produce economical and highly-effective optical cords or cables with optical connectors.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: June 23, 1998
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Akira Nagayama, Takashi Yoshizawa, Kunihiko Sasakura, Tadao Saitoh, Sigemitu Oguchi
  • Patent number: 5503590
    Abstract: A constant range polishing apparatus for polishing an end face of an optical fiber connector ferrule. The apparatus comprises a polishing plate adapted to be rotated about a polishing plate axis for polishing the end face of the connector ferrule. The polishing plate includes a disc-shaped substrate having a circular surface including an outer ring area, an inner ring area disposed radially inwardly with respect to the outer ring area, and an inner portion disposed radially inwardly with respect to the inner ring area.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: April 2, 1996
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tadao Saitoh, Akira Nagayama
  • Patent number: 5048929
    Abstract: In a method and apparatus for forming a curved surface, a polishing plate consisting of a film-like elastic member is supported at two positions, i.e., central and peripheral portions thereof, and is rotated while two cylinders having different heights and diameters are urged upward against portions between the central and peripheral portions of the polishing plate, and an object to be processed is urged downward against a surface formed between the two cylinders while the object is rotated, thereby forming a curved surface.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: September 17, 1991
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Junji Watanabe, Tadao Saitoh, Kazuo Matsunaga
  • Patent number: 4914867
    Abstract: Apparatus for processing an end face of an optical fiber connector includes a rotatable index shaft mounted on a frame. A plurality of rotatable chucks are mounted on the index shaft so as to hold optical fiber connectors, respectively. In accordance with the rotation of the index shaft, the chucks can be moved sequentially from one index position to another so as to grind and finish the optical fiber connector. A rotatable drive gear is disposed coaxially with the index shaft. A driven gear is fixedly mounted on each chuck. A pair of first and second intermediate gears are connected to the drive and driven gears, respectively. A clutch is interposed between the pair of intermediate gears and normally connecting them together to transmit the rotation of the drive gear to the driven gear to rotate each chuck.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: April 10, 1990
    Assignees: Kabushiki Kaisha Sankyo Seiki Seisakushi, Nippon Telegraph and Telephone Corp.
    Inventors: Kazuharu Saito, Junji Watanabe, Tadao Saitoh, Kazuo Matsunaga
  • Patent number: 4863988
    Abstract: A composition for curable paints, comprising(A) 100 parts by weight of a resin for curable paints, and(B) 0.5 to 10 parts by weight of chlorinated and graft-modified polypropylene which is produced by chlorinating polypropylene graft-modified with a grafting component selected from the group consisting of alpha,beta-unsaturated dicarboxylic acids, anhydrides thereof and esters thereof, and which has a chlorine content of 5 to 50% by weight, said graft-modified polypropylene having a degree of saponification of 5 to 150 mg/g and an intrinsic viscosity [.eta.] of 0.1 to 5 dl/g. A curable paint comprising the composition and a diluent.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: September 5, 1989
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Hajime Inagaki, Tadao Saitoh
  • Patent number: 4636008
    Abstract: An anti-skid braking control system which includes an actuator disposed in a braking fluid pressure circuit for controlling a braking fluid pressure.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: January 13, 1987
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshiharu Adachi, Tadao Saitoh, Takumi Nishimura