Granted Patent
Utility
US 4,666,565 · App. 06/884,882
Gas sensor and method
Inventor:
John V. Dobson
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Jul 10, 1986
Inventor
John V. Dobson
Assignee (at issue)
British Gas
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.