Granted Patent
Utility
US 6,778,353 · App. 10/712,548
Balance ring
Inventor:
Bruce M. Harper
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Nov 12, 2003
Inventor
Bruce M. Harper
Assignee (at issue)
Komag, Inc.
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.