Granted Patent
Utility
US 5,715,621 · App. 08/713,782
Regenerative desiccant air dryer
Inventor:
Matthew D. Mitsch
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Sep 13, 1996
Inventor
Matthew D. Mitsch
Assignee (at issue)
Westinghouse Air Brake Co.
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.