Granted Patent
Utility
US 4,470,838 · App. 06/470,153
Composite blasthead for quench station of glass sheet tempering system
Inventors:
Ronald A. McMaster, Robert G. McMaster
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Feb 28, 1983
Inventors
Ronald A. McMaster
Robert G. McMaster
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.