Granted Patent
Utility
US 6,440,489 · App. 09/712,909
Moisture exchanging element and a method of its manufacture
Inventor:
Per-Johan Aronsson
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Nov 16, 2000
Inventor
Per-Johan Aronsson
Assignee (at issue)
Proflute 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.