Granted Patent
Utility
US 5,012,212 · App. 07/255,019
Open resonator for electromagnetic waves having a polarized coupling region
Inventors:
Toshiaki Matsui, Kenichi Araki
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Oct 7, 1988
Inventors
Toshiaki Matsui
Kenichi Araki
Assignee (at issue)
Communications Research Laboratory, Ministry of Posts and Telecommunications
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.