Granted Patent
Utility
US 6,553,034 · App. 09/905,734
Virtual path ring protection method and apparatus
Inventors:
Eric Chan, Andy D. Helfrich, Leland M. Kornhaus
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Jul 14, 2001
Inventors
Eric Chan
Andy D. Helfrich
Leland M. Kornhaus
Assignee (at issue)
Tellabs Operations, 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.