Granted Patent
Utility
US 3,973,227 · App. 05/548,675
Transmission line for TDM communication system
Inventor:
Paolo Erculiani
Patented Case
View Patent ↗
Granted: Aug 3, 1976
Filed: Feb 10, 1975
Inventor
Paolo Erculiani
Assignee (at issue)
Societa Italiana Telecomunicazioni Siemens S.p.A.
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.