Granted Patent
Utility
US 6,237,900 · App. 09/265,506
Rigid evaporative heat exchangers
Inventors:
Brian S. Drew, John Edward Rule
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Mar 8, 1999
Inventors
Brian S. Drew
John Edward Rule
Assignee (at issue)
Baltimore Aircoil Company, 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.