Granted Patent
Utility
US 4,896,934 · App. 07/306,528
Broadband optical multicast switch
Inventors:
Edward Arthurs, Matthew S. Goodman, Chong Kwon Kim, Tony Tung-Ying Lee
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Feb 3, 1989
Inventors
Edward Arthurs
Matthew S. Goodman
Chong Kwon Kim
Tony Tung-Ying Lee
Assignee (at issue)
Bell Communications Research, Inc.
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.