Patents by Inventor Ishibashi Hiromichi

Ishibashi Hiromichi 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).

  • Optical disc and optical disc address reading apparatus and method
    Patent number: 6912185
    Abstract: An optical disc having marks for dispersed addresses that can be easily detected with high precision. A dispersed address comprises synchronization marks, positive marks, and negative marks. Synchronization marks, positive marks, and negative marks are formed along a groove as partial discontinuities or partial modifications in the wobbled groove.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: June 28, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Furumiya Shigeru, Ishibashi Hiromichi