Granted Patent
Utility
US 5,880,899 · App. 08/810,154
Removal of raised irregularities on a data storage disk with controlled abrasion by a magnetoresistive head
Inventors:
Michael David Blachek, Gordon James Smith
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Feb 25, 1997
Inventors
Michael David Blachek
Gordon James Smith
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.