Granted Patent
Utility
US 6,281,838 · App. 09/302,533
Base-3 switched-line phase shifter using micro electro mechanical (MEMS) technology
Inventor:
John H. Hong
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Apr 30, 1999
Inventor
John H. Hong
Assignee (at issue)
Rockwell Science Center, LLC
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.