Granted Patent
Utility
US 6,541,131 · App. 09/845,167
Perpendicular recording media with enhanced coercivity
Inventor:
Roger Alan Ristau
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: May 1, 2001
Inventor
Roger Alan Ristau
Assignee (at issue)
Seagate Technology LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.