Granted Patent
Utility
US 6,830,155 · App. 10/157,246
Vibratory screening apparatus
Inventors:
Michael Trench, Robert John Allen, Peter John Rubie, John Russell, Paul Dalziel, Ben Plant, John D. Oliver, Neville Warnes, Russell Taylor, John Ettingshausen, Edward McKerr
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: May 28, 2002
Inventors
Michael Trench
Robert John Allen
Peter John Rubie
John Russell
Paul Dalziel
Ben Plant
John D. Oliver
Neville Warnes
Russell Taylor
John Ettingshausen
Edward McKerr
Assignee (at issue)
Ludowici Mineral Processing Equipment Pty. Ltd.
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.