Granted Patent
Utility
US 5,042,425 · App. 07/438,663
Aquarium and bird and animal containment system
Inventor:
Robert Frost
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Nov 20, 1989
Inventor
Robert Frost
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.