Granted Patent
Utility
US 5,166,831 · App. 07/771,314
Light beam deflecting apparatus including a fluid
Inventor:
Edward E. Hart
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Oct 2, 1991
Inventor
Edward E. Hart
Assignee (at issue)
Spectra-Physics Laserplane, 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.