Granted Patent
Utility
US 4,973,940 · App. 07/071,641
Optimum impedance system for coupling transceiver to power line carrier network
Inventors:
Hiroshi Sakai, William H. McGinnis, Hideo Nishibayashi
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Jul 8, 1987
Inventors
Hiroshi Sakai
William H. McGinnis
Hideo Nishibayashi
Assignee (at issue)
Colin Electronics Co., Ltd.
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.