Granted Patent
Utility
US 4,489,870 · App. 06/411,195
Apparatus for severing edges of a glass sheet
Inventors:
Bernard H. Prange, Dale J. Helenschmidt
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Aug 25, 1982
Inventors
Bernard H. Prange
Dale J. Helenschmidt
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.