Granted Patent
Utility
US 6,789,470 · App. 10/027,428
Cooling device for cooling an engraving system
Inventor:
Bernd Luebcke
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Dec 19, 2001
Inventor
Bernd Luebcke
Assignee (at issue)
Hell Gravure Systems GmbH
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.