Granted Patent
Utility
US 4,982,301 · App. 07/515,543
Magnetic head for perpendicular magnetic recording system and process
Inventor:
Kazuo Endo
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Apr 26, 1990
Inventor
Kazuo Endo
Assignee (at issue)
Seagate Technology LLC
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.