Granted Patent
Utility
US 6,529,328 · App. 09/363,824
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Inventors:
Yihao Cheng, Donald R. Zimmerman
Patented Case
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Granted: Mar 4, 2003
Filed: Jul 30, 1999
Inventors
Yihao Cheng
Donald R. Zimmerman
Assignee (at issue)
JDS Fitel 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.