Granted Patent
Utility
US 5,175,658 · App. 07/634,834
Thin film magnetic head having a protective coating and method for making same
Inventors:
Henry Chang, Mao-Min Chen, Cheng T. Horng, Robert O. Schwenker
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Dec 27, 1990
Inventors
Henry Chang
Mao-Min Chen
Cheng T. Horng
Robert O. Schwenker
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.