Granted Patent
Utility
US 5,864,399 · App. 08/879,665
Method for counting particles in a fluent stream
Inventors:
Kenneth L. Girvin, Richard K. DeFreez
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Jun 23, 1997
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.