Granted Patent
Utility
US 4,329,667 · App. 06/222,227
Coaxial cable low frequency band-pass filter
Inventor:
Robert H. Schafer
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Jan 5, 1981
Inventor
Robert H. Schafer
Assignee (at issue)
UTI LIMITED PARTNERSHIP
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.