Granted Patent
Utility
US 4,817,874 · App. 06/794,234
Nozzle attachment for abrasive fluid-jet cutting systems
Inventor:
Richard Z. Jarzebowicz
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Oct 31, 1985
Inventor
Richard Z. Jarzebowicz
Assignee (at issue)
Flow Systems, Inc.
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.