Granted Patent
Utility
US 4,370,836 · App. 06/180,804
Universal abrasive cleaning apparatus
Inventor:
Wayne B. Hockett
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Aug 25, 1980
Inventor
Wayne B. Hockett
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.