Granted Patent
Utility
US 6,122,144 · App. 08/995,890
Contoured pole tip structures for minimizing side track erasure
Inventors:
Thomas Young Chang, David Heim, Edward Hinpong Lee
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Dec 22, 1997
Inventors
Thomas Young Chang
David Heim
Edward Hinpong Lee
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.