Granted Patent
Utility
US 4,289,261 · App. 06/127,692
Method of thermally inducing bending moment forces to sever a glass sheet along a score
Inventor:
J. Robert Dahlberg
Patented Case
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Granted: Sep 15, 1981
Filed: Mar 6, 1980
Inventor
J. Robert Dahlberg
Assignee (at issue)
PPG Industries, 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.