Granted Patent
Utility
US 5,730,646 · App. 08/730,162
Oscillating blast cleaner
Inventor:
Robert B. Watkin
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Oct 15, 1996
Inventor
Robert B. Watkin
Assignee (at issue)
United States Filter Corporation
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.