Granted Patent
Utility
US 6,234,112 · App. 09/476,349
Self-cleaning pet litter box assembly
Inventor:
Richard H. Emery
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Jan 3, 2000
Inventor
Richard H. Emery
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.