The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 1995
Filed:
Sep. 05, 1991
Yoshio Sato, Hitachi, JP;
Nobuyoshi Tsuboi, Ibaraki, JP;
Hiroyuki Minemura, Hitachi, JP;
Hisashi Andoh, Hitachi, JP;
Masaichi Nagai, Hitachi, JP;
Isao Ikuta, Iwaki, JP;
Yoshimi Kato, Takahagi, JP;
Yoshihito Maeda, Mito, JP;
Tatsuya Sugita, Hitachi, JP;
Yutaka Sugita, Tokorozawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The information processor uses a portable memory formed on a transparent substrate which is able to be overwritten by laser power modulation system. The memory includes a disk type recording medium rotatably incorporated within a thin case, and carries out write/read/erase by means of a first magnetic field application device, a second magnetic field application device, and an optical head radiating light through the case which has at least a transparent light-incident portion. The case includes therein a rotation means for rotating the recording medium within the case, thereby enabling even further reduction in size of the information processor.