Granted Patent
Utility
US 4,631,721 · App. 06/640,917
Bidirectional communication system of a two-wire bus comprising an active terminator
Inventors:
Tatsuhiro Ono, Shin'ichi Koike, Haruhiko Tsuchiya, Yuji INOUE
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Aug 15, 1984
Inventors
Tatsuhiro Ono
Shin'ichi Koike
Haruhiko Tsuchiya
Yuji INOUE
Assignees (at issue)
NEC CORPORATION
Nippon Telegraph and Telephone Public 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.