Granted Patent
Utility
US 5,533,545 · App. 08/504,058
Drain system
Inventor:
Larry Robinson
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Jul 18, 1995
Inventor
Larry Robinson
Assignee (at issue)
Air System Products, 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.