Granted Patent
Utility
US 4,470,696 · App. 06/311,216
Laser doppler velocimeter
Inventor:
Paul T. Ballard
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Oct 14, 1981
Inventor
Paul T. Ballard
Assignee (at issue)
Systems Research Laboratories, 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.