Granted Patent
Utility
US 5,605,280 · App. 08/650,621
Self-balancing variable air volume heating and cooling system
Inventor:
Thomas B. Hartman
Patented Case
View Patent ↗
Granted: Feb 25, 1997
Filed: May 20, 1996
Inventor
Thomas B. Hartman
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.