Granted Patent
Utility
US 5,645,678 · App. 08/410,306
Device for producing insulating glass panes filled with heavy gas
Inventor:
Peter Lisec
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Mar 24, 1995
Inventor
Peter Lisec
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.