Granted Patent
Utility
US 5,677,972 · App. 08/593,149
High efficiency direct coupling of radiant electromagnetic energy into dielectric wave guide structure
Inventor:
John M. Popovich
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Feb 21, 1996
Inventor
John M. Popovich
Assignee (at issue)
TIR Technologies, 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.