Granted Patent
Utility
US 5,811,812 · App. 08/743,411
Multiple-gas NDIR analyzer
Inventors:
Kevin Gregg Williams, Kim Christensen
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Nov 1, 1996
Inventors
Kevin Gregg Williams
Kim Christensen
Assignee (at issue)
Andros
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.