Granted Patent
Utility
US 5,218,488 · App. 07/729,248
Method and apparatus for producing write and erase magnetic field for disk drive
Inventor:
Thomas E. Berg
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Jul 12, 1991
Inventor
Thomas E. Berg
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.