Patents by Inventor Kazuyou UMEZAWA

Kazuyou UMEZAWA 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).

  • STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130279317
    Abstract: According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.
    Type: Application
    Filed: June 20, 2013
    Publication date: October 24, 2013
    Inventors: Seiji MORITA, Koji TAKAZAWA, Kazuyou UMEZAWA, Hideo ANDO, Yasuaki OOTERA, Naoki MORISHITA, Naomasa NAKAMURA