Patents by Inventor Koichi Sagisaka

Koichi Sagisaka 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).

  • Tray for conveying magnetic head for magnetic disk
    Patent number: 6780490
    Abstract: Trays for carrying magnetic heads for magnetic disks are provided, such as magnetic-head carrying trays which are less apt to cause electrical damage due to electrostatic discharge, an excess flow of contact current, etc. or physicochemical damage such as particle detachment, contamination with ions, etc. The trays for carrying magnetic heads for magnetic disks are trays obtained by molding a conductive thermoplastic resin composition containing a conductive loading material, e.g., a conductive filler, and have a surface resistance of from 103 to 1012 &OHgr;.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: August 24, 2004
    Assignees: Yukadenshi Co., Ltd., Alps Electric Co., Ltd.
    Inventors: Sigeru Tanaka, Etuji Asano, Tomohiko Tanaka, Koichi Sagisaka
  • Tray for carrying magnetoresistive head of magnetic disk
    Patent number: 6686009
    Abstract: A tray for carrying magnetoresistive heads of magnetic disks which is obtained by molding a resin composition comprising 100 parts by weight of a thermoplastic resin material and, incorporated therein, from 0.1 to 8 parts by weight of carbon fibrils having a fiber diameter of 100 nm or smaller and a fiber length/fiber diameter ratio of 5 or larger. The tray has a stable surface resistivity in the range of from 104 to 1012 &OHgr;/□, has an even surface state, and hardly generates particles upon scratching, wearing, or cleaning.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: February 3, 2004
    Assignee: Yukadenshi Co., Ltd.
    Inventors: Shigeru Tanaka, Koichi Sagisaka, Tomohiro Kaniwa, Mitsuo Sato, Michiaki Sakatoku
  • Tray for carrying magnetoresistive head of magnetic disk
    Publication number: 20020060314
    Abstract: A tray for carrying magnetoresistive heads of magnetic disks which is obtained by molding a resin composition comprising 100 parts by weight of a thermoplastic resin material and, incorporated therein, from 0.1 to 8 parts by weight of carbon fibrils having a fiber diameter of 100 nm or smaller and a fiber length/fiber diameter ratio of 5 or larger. The tray has a stable surface resistivity in the range of from 104 to 1012 &OHgr;/□, has an even surface state, and hardly generates particles upon scratching, wearing, or cleaning.
    Type: Application
    Filed: December 10, 2001
    Publication date: May 23, 2002
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Shigeru Tanaka, Koichi Sagisaka, Tomohiro Kaniwa, Mitsuo Sato, Michiaki Sakatoku