Granted Patent
Utility
US 6,757,247 · App. 09/026,729
Circuit and method for controlling virtual connections in a ring network
Inventors:
Dan Zheng, Sheila C. Field
Patented Case
View Patent ↗
Granted: Jun 29, 2004
Filed: Feb 20, 1998
Inventors
Dan Zheng
Sheila C. Field
Assignee (at issue)
ADC Telecommunications, 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.