Granted Patent
Utility
US 5,350,113 · App. 08/097,397
Air flow control system and method for a dual duct system
Inventor:
James J. Coogan
Patented Case
View Patent ↗
Granted: Sep 27, 1994
Filed: Jul 23, 1993
Inventor
James J. Coogan
Assignee (at issue)
Landis & Gyr Powers, 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.