Granted Patent
Utility
US 6,651,657 · App. 09/551,052
Respirator for different forms of respiration
Inventors:
Jürgen Manigel, Thomas Simmerer
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Apr 18, 2000
Inventors
Jürgen Manigel
Thomas Simmerer
Assignee (at issue)
Dräger Medizintechnik GmbH
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.