Granted Patent
Utility
US 4,989,946 · App. 07/300,088
Fiber optic switch
Inventors:
Joseph C. Williams, Sarah E. Goodman
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Jan 19, 1989
Inventors
Joseph C. Williams
Sarah E. Goodman
Assignee (at issue)
Alcatel NA, 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.