Patents by Inventor Masatsugu Yamahana

Masatsugu Yamahana 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).

  • Disk device and method of changing rotational speed of disk device
    Patent number: 6940793
    Abstract: A disk drive includes a disk motor for rotating a disk, a disk motor driving unit for driving the disk motor, and a controlling unit for controlling the disk motor driving unit. When an upper limit value of a disk rotation speed is received as an input value, the input value is interpreted as a rotation speed specification, so that a command packet including the upper limit value of the disk rotation speed is generated to output it to a controlling unit. The controlling unit sets the upper limit value of the disk rotation speed included in the command packet to the disk motor driving unit. The disk motor driving unit drives the disk motor at the upper limit value of the set disk rotation speed.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: September 6, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akiyoshi Yamashita, Masatsugu Yamahana, Shin'ichi Kambe
  • Method for transferring data, storage device, its controlling method and controller for data transfer
    Publication number: 20030108340
    Abstract: An object of the present invention is to provide a storage device having a USB interface, which transfers data in an isochronous transfer mode when the data on a recording medium attached to the storage device is video data or audio data.
    Type: Application
    Filed: September 26, 2002
    Publication date: June 12, 2003
    Inventors: Akiyoshi Yamashita, Masatsugu Yamahana, Takayuki Fujioka
  • Disk device and method of changing rotational speed of disk device
    Publication number: 20020159365
    Abstract: A disk drive includes a disk motor for rotating a disk, a disk motor driving unit for driving the disk motor, and a controlling unit for controlling the disk motor driving unit. When an upper limit value of a disk rotation speed is received as an input value, the input value is interpreted as a rotation speed specification, so that a command packet including the upper limit value of the disk rotation speed is generated to output it to a controlling unit. The controlling unit sets the upper limit value of the disk rotation speed included in the command packet to the disk motor driving unit. The disk motor driving unit drives the disk motor at the upper limit value of the set disk rotation speed.
    Type: Application
    Filed: September 13, 2001
    Publication date: October 31, 2002
    Inventors: Akiyoshi Yamashita, Masatsugu Yamahana, Shin?apos;ichi Kambe