Granted Patent
Utility
US 5,375,592 · App. 08/045,518
Carbon dioxide detector and shield
Inventors:
Gilbert M. Kirk, James Dale Bickley
Patented Case
View Patent ↗
Granted: Dec 27, 1994
Filed: Apr 8, 1993
Inventors
Gilbert M. Kirk
James Dale Bickley
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.