Granted Patent
Utility
US 6,062,608 · App. 09/124,813
Coaxial flue-system for direct-vent fireplaces
Inventor:
Fred B. Gerth
Patented Case
View Patent ↗
Granted: May 16, 2000
Filed: Jul 29, 1998
Inventor
Fred B. Gerth
Assignee (at issue)
Marco Manufacturing, Inc.
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.