Granted Patent
Utility
US 5,175,713 · App. 06/550,282
Laser sound detector
Inventor:
Samuel S. Ballard
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: Nov 9, 1983
Inventor
Samuel S. Ballard
Assignee (at issue)
Lockheed Sanders, 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.