Granted Patent
Utility
US 6,490,040 · App. 09/637,717
Fume sensor system and methods for background noise suppression
Inventors:
John W. Berthold, Larry A. Jeffers
Patented Case
View Patent ↗
Granted: Dec 3, 2002
Filed: Aug 11, 2000
Inventors
John W. Berthold
Larry A. Jeffers
Assignee (at issue)
McDermott Technology, 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.