Granted Patent
Utility
US 5,423,313 · App. 07/890,291
Respirator intended for connection to human or animal airways
Inventors:
Sven-Gunnar Olsson, Bjorn Jonson
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: May 27, 1992
Inventors
Sven-Gunnar Olsson
Bjorn Jonson
Assignee (at issue)
Siemens Elema AB
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.