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:
Jan. 12, 1993
Filed:
Aug. 16, 1989
Mamoru Tohchi, Odawara, JP;
Akira Kurano, Odawara, JP;
Hisaharu Takeuchi, Odawara, JP;
Yukihisa Kashima, Odawara, JP;
Ikuo Kawaguchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An external memory device subsystem and a data recording device, which issue a command specifying a plurality of tracks (surfaces) in a rotary type memory device prior to a read or write instruction being issued from the data processing unit of higher rank to the rotary type memory device through a control unit; selects sequentially the plurality of individual tracks (surfaces) previously specified when executing a read or write command after the receipt of the command; and in this way can read/write continuously without wait time interruptions when data is discontinuous.