Granted Patent
Utility
US 5,684,585 · App. 08/532,900
Optical particle counter employing a field-calibrator
Inventor:
Kenneth L. Girvin
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Sep 22, 1995
Inventor
Kenneth L. Girvin
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.