Granted Patent
Utility
US 5,989,674 · App. 09/079,907
Thin film disk with acicular magnetic grains
Inventors:
Ernesto E. Marinero, Timothy Martin Reith, Brian R. York
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 15, 1998
Inventors
Ernesto E. Marinero
Timothy Martin Reith
Brian R. York
Assignee (at issue)
International Business Machines Corporation
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.