Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-10-10
2006-10-10
Wong, Kin (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S060000, C360S071000
Reexamination Certificate
active
07119980
ABSTRACT:
Secure data is written to a disk during manufacture in such a way that it can be read but not copied. Methods include writing triangular transitions or very slow transitions from positive magnetic to negative magnetic and then erasing the negative parts to yield a code that consists of positive read back amplitudes only. Or, high frequency transitions can be written during servo writing.
REFERENCES:
patent: 3686649 (1972-08-01), Behr
patent: 3959631 (1976-05-01), Otten
patent: 4074328 (1978-02-01), Hardwick
patent: 4120629 (1978-10-01), Christian et al.
patent: 4314290 (1982-02-01), Ragle
patent: 4346413 (1982-08-01), Hack
patent: 4589037 (1986-05-01), Jen et al.
patent: 4785361 (1988-11-01), Brotby
patent: 4866769 (1989-09-01), Karp
patent: 4906988 (1990-03-01), Copella
patent: 4910625 (1990-03-01), Albrecht et al.
patent: 5027396 (1991-06-01), Platteter et al.
patent: 5241442 (1993-08-01), Akashi
patent: 5301072 (1994-04-01), Wilson
patent: 5392351 (1995-02-01), Hasebe et al.
patent: 5555304 (1996-09-01), Hasebe et al.
patent: 5661800 (1997-08-01), Nakashima et al.
patent: 5754649 (1998-05-01), Ryan et al.
patent: 5757749 (1998-05-01), Misawa
patent: 6366419 (2002-04-01), Gaub et al.
patent: 6411459 (2002-06-01), Belser et al.
patent: 6433948 (2002-08-01), Lee
patent: 6542325 (2003-04-01), Molstad et al.
patent: 6691226 (2004-02-01), Frank et al.
patent: 6754016 (2004-06-01), Messner et al.
patent: 6788800 (2004-09-01), Carr et al.
patent: 6879457 (2005-04-01), Eaton et al.
patent: 6885513 (2005-04-01), Baker
patent: 6898038 (2005-05-01), Fennema et al.
Wikipedia, en.wikipedia.org/wiki/Digital—signal—processor.
Bandic Zvonimir Z.
Chen Martin
Huang Fu-Ying
Wilson Bruce Alexander
Hitachi Global Storage Technologies - Netherlands B.V.
Rogitz John L.
Wong Kin
LandOfFree
System and method for writing secure data to disk does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for writing secure data to disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for writing secure data to disk will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3663133