Granted Patent
Utility
US 6,681,921 · App. 10/261,222
Enclosed belt conveyor assembly
Inventor:
Thomas Schroeder
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Sep 30, 2002
Inventor
Thomas Schroeder
Assignee (at issue)
InterSystems, a division of Enduro Systems, 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.