Granted Patent
Utility
US 4,658,394 · App. 06/680,398
Optical transmission
Inventors:
Steven S. Cheng, Jan Lipson, Stewart D. Personick
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Dec 12, 1984
Inventors
Steven S. Cheng
Jan Lipson
Stewart D. Personick
Assignees (at issue)
Bell Communications Research, Inc.
AT&T Bell Laboratories
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.