Granted Patent
Utility
US 4,415,897 · App. 06/265,957
Precision control of RF attenuators for STC applications
Inventor:
Henry R. Kennedy
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: May 21, 1981
Inventor
Henry R. Kennedy
Assignee (at issue)
International Telephone and Telegraph 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.