Granted Patent
Utility
US 5,181,663 · App. 07/829,317
Tub grinder with screen portion
Inventors:
John Dorscht, Patrick Hogan
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Feb 3, 1992
Inventors
John Dorscht
Patrick Hogan
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.