Granted Patent
Utility
US 6,561,874 · App. 09/718,658
Apparatus and method for abrasive jet finishing of deeply concave surfaces using magnetorheological fluid
Inventor:
William Kordonski
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Nov 22, 2000
Inventor
William Kordonski
Assignee (at issue)
QED Technologies, 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.