Granted Patent
Utility
US 5,832,734 · App. 08/930,046
Methods and device for air treatment
Inventor:
Sven-Olle Rothstein
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Sep 26, 1997
Inventor
Sven-Olle Rothstein
Assignee (at issue)
Frigoscandia Equipment 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.