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:
Nov. 09, 1999
Filed:
Oct. 11, 1996
Satoshi Itami, Kawasaki, JP;
Kenichi Utsumi, Kawasaki, JP;
Masahiro Nakada, Kawasaki, JP;
Hiroshi Suzuki, Kawasaki, JP;
Kazunori Naito, Kawasaki, JP;
Kazuo Nakashima, Kawasaki, JP;
Toshikatsu Narumi, Kawasaki, JP;
Masaru Nakahara, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In a method for preventing unauthorized use of a recording medium having a user accessible area and a user inaccessible area, first information is read from the user inaccessible area of the recording medium. The first information is compared with second information concerning a true recording medium (lawfully produced copy). It is then concluded that the recording medium is the true recording medium when the first information corresponds to the second information.