Granted Patent
Utility
US 4,647,777 · App. 06/740,186
Selective gas detector
Inventor:
Emilio Meyer
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: May 31, 1985
Inventor
Emilio Meyer
Assignee (at issue)
Ametrek, Inc.
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.