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:
Jul. 25, 1995
Filed:
Apr. 19, 1993
Applicant:
Inventor:
Rakesh Mahajan, Laguna Hills, CA (US);
Assignee:
Canon Information Systems, Inc., Costa Mesa, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395164 ;
Abstract
A method and apparatus for updating data stored in a write once/read many memory which comprises creating a virtual image of data stored in the memory, updating data in the virtual image of the memory and designating updated data in the virtual image, and writing designated updated data from the virtual image to the memory. In the virtual image there is a main journal for organizing file information on the memory and file journals for each file stored on the memory. Each file journal contains self-describing information for its corresponding file.