Granted Patent
Utility
US 4,924,848 · App. 07/396,231
High-efficiency furnace for mobile homes
Inventor:
Thomas D. Vaughn
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Aug 21, 1989
Inventor
Thomas D. Vaughn
Assignee (at issue)
Nordyne LLC
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.