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. 10, 2002
Filed:
May. 04, 1993
Soichi Isono, Yokohama, JP;
Satoshi Kawamura, Yokohama, JP;
Kiyoshi Honda, Yokohama, JP;
Toshimitsu Kaku, Sagamihara, JP;
Hitoshi Komatsu, Kanagawa-ken, JP;
Yuji Yamane, Odawara, JP;
Yasushi Fukuda, Odawara, JP;
Toshio Niihara, Sayama, JP;
Hiroshi Ide, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Multibeam optical disk record and reproduction apparatus and method, in which at least two light beams generated are concentrated in different positions of on recording tracks of a recording medium to record or reproduce data to or from the recording medium on the different positions at the same time. The light beams are moved independently of each other across the recording tracks so that any one light beam is movable during the recording or reproducing of data by another light beam. This allows parallel recording/reproducing with a plurality of light beams without producing areas unaccessed due to the jumps of the light beams.