Granted Patent
Utility
US 6,821,728 · App. 09/720,106
Screening system
Inventors:
Dominik Escher, Alcide Barberis
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Mar 9, 2001
Inventors
Dominik Escher
Alcide Barberis
Assignee (at issue)
ESBATech
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.