Granted Patent
Utility
US 5,470,747 · App. 08/188,891
Spherical composter
Inventor:
Joseph Sikorski
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Jan 31, 1994
Inventor
Joseph Sikorski
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.