Granted Patent
Utility
US 5,011,286 · App. 07/389,061
Multisensor particle counter utilizing a single energy source
Inventor:
Louis J. Petralli
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Aug 3, 1989
Inventor
Louis J. Petralli
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.