Granted Patent
Utility
US 5,940,405 · App. 08/728,855
High-speed two-way multiplex data communication system and data communication device used therein
Inventor:
Shigeru Sakuma
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Oct 10, 1996
Inventor
Shigeru Sakuma
Assignee (at issue)
NEC 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.