Patents by Inventor Thoru Sakuwa

Thoru Sakuwa 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).

  • Manufacturing method of liquid crystal display element and manufacturing apparatus of the same
    Patent number: 6272989
    Abstract: Manufacturing methods of liquid crystal display elements and manufacturing apparatuses for same which prevent an insulating substrate from sliding out of position and which attract and fix the substrate firmly and flatly by removing deformations of the substrate with substantially strong forces, even when a thin-type glass substrate or a thin-type plastic substrate is employed. A blower is used to exert attractive forces on the insulating substrate placed on a stage at a second attraction opening. A vacuum pump and a switching valve are used to exert the attractive forces first at the first attraction openings of the first group, then at the first attraction openings of the first and second groups, and finally at the first attraction openings of the first, second, and third groups on nearly the entire insulating substrate.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: August 14, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenji Misono, Makoto Iwamoto, Thoru Sakuwa, Hiroyuki Nagano, Kenji Nishida
  • Manufacturing method of liquid crystal display element and manufacturing apparatus of the same
    Patent number: 6173648
    Abstract: Manufacturing methods of liquid crystal display elements and manufacturing apparatuses for same which prevent an insulating substrate from sliding out of position and which attract and fix the substrate firmly and flatly by removing deformations of the substrate with substantially strong forces, even when a thin-type glass substrate or a thin-type plastic substrate is employed. A blower is used to exert attractive forces on the insulating substrate placed on a stage at a second attraction opening. A vacuum pump and a switching valve are used to exert the attractive forces first at the first attraction openings of the first group, then at the first attraction openings of the first and second groups, and finally at the first attraction openings of the first, second, and third groups on nearly the entire insulating substrate.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: January 16, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenji Misono, Makoto Iwamoto, Thoru Sakuwa, Hiroyuki Nagano, Kenji Nishida