Granted Patent
Utility
US 5,642,193 · App. 08/614,814
Particle counter employing a solid-state laser with an intracavity view volume
Inventors:
Kenneth L. Girvin, Richard K. DeFreez
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Mar 8, 1996
Inventors
Kenneth L. Girvin
Richard K. DeFreez
Assignee (at issue)
Met One, 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.