Granted Patent
Utility
US 6,755,480 · App. 10/090,104
Drum-type dual channel water-jet assisted cutting head
Inventors:
Donald B. Sult, Jeffrey J. Schwoebel
Patented Case
View Patent ↗
Granted: Jun 29, 2004
Filed: Feb 27, 2002
Inventors
Donald B. Sult
Jeffrey J. Schwoebel
Assignee (at issue)
Amvest 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.