Granted Patent
Utility
US 6,004,472 · App. 08/858,208
Dual etch step process for making a three etch depth air bearing slider
Inventors:
Lee K. Dorius, Sanford A. Bolasna
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: May 14, 1997
Inventors
Lee K. Dorius
Sanford A. Bolasna
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.