Granted Patent
Utility
US 5,086,766 · App. 07/585,068
Medical breathing apparatus
Inventor:
Allan Beacham
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Oct 15, 1990
Inventor
Allan Beacham
Assignee (at issue)
Virotherm Laboratories Ltd.
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.