Granted Patent
Utility
US 4,554,713 · App. 06/415,638
Apparatus for differentially stretching, aligning and cutting sheet material
Inventor:
Joseph Chabal
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Sep 7, 1982
Inventor
Joseph Chabal
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.