Granted Patent
Utility
US 6,712,072 · App. 09/622,983
Respirator mask
Inventor:
Bernd Christoph Lang
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Aug 25, 2000
Inventor
Bernd Christoph Lang
Assignee (at issue)
MAP Medizintechnik fur Arzt und Patient GmbH & Co. KG
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.