Granted Patent
Utility
US 5,402,483 · App. 07/748,979
Digital telephone system with terminals connected to a digital exchange unit providing all functions of the terminals
Inventor:
Gunter Weinberger
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Aug 23, 1991
Inventor
Gunter Weinberger
Assignee (at issue)
Siemens Aktiengesellschaft
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.