Granted Patent
Utility
US 5,309,379 · App. 07/663,855
Monitoring
Inventors:
Keith C. Rawlings, Roger C. Witcomb
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Mar 11, 1991
Inventors
Keith C. Rawlings
Roger C. Witcomb
Assignee (at issue)
Smiths Industries Public Limited Company
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.