Granted Patent
Utility
US 4,957,531 · App. 07/367,849
Apparatus for heating bending and quenching glass sheets
Inventors:
Harold A. McMaster, Ben M. Balestra
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Jun 19, 1989
Inventors
Harold A. McMaster
Ben M. Balestra
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.