Granted Patent
Utility
US 4,480,252 · App. 06/330,139
Gas detector
Inventor:
Carlos Ernesto Buonavita
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Dec 14, 1981
Inventor
Carlos Ernesto Buonavita
Assignee (at issue)
International Telephone and Telegraph Corporation
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.