Granted Patent
Utility
US 4,940,327 · App. 07/262,457
Method and apparatus for real time asbestos aerosol monitoring
Inventor:
Pedro Lilienfeld
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Oct 25, 1988
Inventor
Pedro Lilienfeld
Assignee (at issue)
Trécé 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.