Patents by Inventor Shigeo Shimada

Shigeo Shimada 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).

  • Apparatus for recording on and playback from both sides of a disk shaped recording medium
    Patent number: 5633847
    Abstract: Simultaneous recording on and playback from both sides of a double sided disk is achieved Sector addresses on both sides of the disk are read by respective scanners. One of address is renumbered according to a preset conversion rule which minimizes a time difference between instructions (for recording and playback on both disk sides) to be output to respective modems. Recording and playback operation are controlled according to the renumbered sector address.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: May 27, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Wataru Masuda, Shigeo Shimada
  • Method for simultaneous recording and playback from both sides of a recording medium
    Patent number: 5563859
    Abstract: A method of simultaneous recording on and playback from both sides of a double sided disk in which sector addresses on both sides are read by scanners, one of them is renumbered according to a conversion rule determined to minimize a time difference between instructions for recording and playback on both sides to be output to modems and recording and playback operation is controlled according to the renumbered sector address.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: October 8, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Wataru Masuda, Shigeo Shimada