Granted Patent
Utility
US 4,300,938 · App. 06/155,872
Glass ribbon attenuating apparatus
Inventor:
Earl L. May
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Jun 2, 1980
Inventor
Earl L. May
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.