Granted Patent
Utility
US 5,875,084 · App. 08/889,348
Magnetic recording disk having protrusions centered in respective depressions
Inventors:
Peter Michael Baumgart, Wing P. Leung, Thao A. Nguyen, Andrew Ching Tam
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Jul 8, 1997
Inventors
Peter Michael Baumgart
Wing P. Leung
Thao A. Nguyen
Andrew Ching Tam
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.