Granted Patent
Utility
US 5,002,349 · App. 07/442,848
Integrated acousto-optic filters and switches
Inventors:
Kwok Wai Cheung, Brian L. Heffner, David A. Smith
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Nov 29, 1989
Inventors
Kwok Wai Cheung
Brian L. Heffner
David A. Smith
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.