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:
May. 21, 2002
Filed:
Feb. 10, 1999
Mitsuo Hagiwara, Tamamura-machi, JP;
Hiromasa Takahashi, Takasaki, JP;
Satoshi Yamato, Maebashi, JP;
Nobuo Shibasaki, Kodaira, JP;
Mitsuo Yotsutani, Takasaki, JP;
Tsutomu Ishii, Matsudo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A microcomputer ( ) which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory ( ) and a central processing unit ( ) is used for control of a disk drive ( ). The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area ( ), and holds a reboot program used for updating the application program in a reboot program area ( ). The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.