Granted Patent
Utility
US 4,806,747 · App. 07/157,779
Optical direction of arrival sensor with cylindrical lens
Inventors:
David S. Dunavan, Richard Babish
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Mar 28, 1988
Inventors
David S. Dunavan
Richard Babish
Assignee (at issue)
PerkinElmer, 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.