Granted Patent
Utility
US 6,027,440 · App. 08/911,468
Pneumatic sheet material hold down conveyor system
Inventor:
Curtis A. Roth
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Aug 14, 1997
Inventor
Curtis A. Roth
Assignee (at issue)
Thermoguard Equipment, 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.