Granted Patent
Utility
US 4,924,850 · App. 07/237,067
Method and adaptor for installing flue liner to a fireplace insert
Inventor:
Heinz H. Rieger
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Aug 29, 1988
Inventor
Heinz H. Rieger
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.