Granted Patent
Utility
US 6,642,890 · App. 10/199,266
Apparatus for coupling electromagnetic signals
Inventor:
Shuguang Chen
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Jul 19, 2002
Inventor
Shuguang Chen
Assignee (at issue)
Paratek Microwave, 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.