Granted Patent
Utility
US 4,228,401 · App. 05/863,562
Communication satellite transponder interconnection utilizing variable bandpass filter
Inventors:
Marvin R. Wachs, Arnold L. Berman
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Dec 22, 1977
Inventors
Marvin R. Wachs
Arnold L. Berman
Assignee (at issue)
Communications Satellite 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.