Granted Patent
Utility
US 4,633,225 · App. 06/588,179
Impedance line matching device using feedback
Inventors:
Toshio Hayashi, Youichi Maeda
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Mar 12, 1984
Inventors
Toshio Hayashi
Youichi Maeda
Assignee (at issue)
Nippon Telegraph and Telephone Public Corporation
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.