Granted Patent
Utility
US 5,357,389 · App. 08/100,212
Alumina material useful with thin film heads
Inventors:
Curtis N. Blanchette, David P. Maddex, Richard F. Shimek
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Aug 2, 1993
Inventors
Curtis N. Blanchette
David P. Maddex
Richard F. Shimek
Assignee (at issue)
Read Rite 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.