Granted Patent
Utility
US 5,604,937 · App. 08/548,709
Urinal screen
Inventor:
Robert A. Davenport
Patented Case
View Patent ↗
Granted: Feb 25, 1997
Filed: Oct 26, 1995
Inventor
Robert A. Davenport
Assignee (at issue)
IMPACT PRODUCTS, LLC
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.