Granted Patent
Utility
US 5,331,487 · App. 07/822,005
Direct access storage device with vapor phase lubricant system and a magnetic disk having a protective layer and immobile physically bonded lubricant layer
Inventors:
Thomas A. Gregory, Ajay Johary, Christopher Guild Keller, Ronald G. Lecander, James J. Mayerle
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Jan 16, 1992
Inventors
Thomas A. Gregory
Ajay Johary
Christopher Guild Keller
Ronald G. Lecander
James J. Mayerle
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.