Granted Patent
Utility
US 4,316,733 · App. 06/191,041
Apparatus and method for attenuating glass ribbon
Inventors:
Robert A. Lawhon, Jeffrey S. Yigdall
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Sep 25, 1980
Inventors
Robert A. Lawhon
Jeffrey S. Yigdall
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.