Granted Patent
Utility
US 4,851,111 · App. 07/119,744
Apparatus for screening paper fiber stock
Inventors:
Andrew Martin, Christian Sauzedde
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Nov 12, 1987
Inventors
Andrew Martin
Christian Sauzedde
Assignee (at issue)
Black Clawson Company, 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.