Granted Patent
Utility
US 6,558,519 · App. 09/319,446
Gas sensors
Inventors:
John Dodgson, Malcolm Trayton Austen, Ian Robins
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Jul 27, 1999
Inventors
John Dodgson
Malcolm Trayton Austen
Ian Robins
Assignee (at issue)
Central Research Laboratories Limited
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.