Granted Patent
Utility
US 6,640,953 · App. 10/099,451
Controlled gravity accumulation conveyor
Inventors:
Gerald A. Brouwer, Clint R. Lupton
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Mar 15, 2002
Inventors
Gerald A. Brouwer
Clint R. Lupton
Assignee (at issue)
Rapistan Systems Advertising Corp.
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.