Patents by Inventor Michihiro Takokoro

Michihiro Takokoro 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).

Magneto-optic recording and reproducing apparatus including a multiple layer recording medium having a premagnetized bias layer replacing an external bias magnetic

Patent number: 5025430

Abstract: A magneto-optic recording a reproducing apparatus including a magneto-optic information-carrying medium having three magnetic layers. A magnetic bias field is generatedd by a third layer which is premagnetized in the direction parallel to the thickness thereof. A second layer is magnetized by a magnetizing unit. The laser beam incident on the layers is controlled to three intensities for writing and reading information.

Type: Grant

Filed: March 31, 1988

Date of Patent: June 18, 1991

Assignee: Mitsubishi Denki Kabushiki Kaisha

Inventors: Michihiro Takokoro, Kazuo Okada, Hitoshi Imai

Magneto-optic recording and reproducing apparatus including a multiple layer recording medium having a premagnetized bias layer replacing an external bias magnetic