Granted Patent
Utility
US 5,147,439 · App. 07/517,166
Variable pressure gas jet system for lifting and forming glass sheets
Inventor:
Gregory James Ritz
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: May 1, 1990
Inventor
Gregory James Ritz
Assignee (at issue)
Glasstech, 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.