Granted Patent
Utility
US 4,533,073 · App. 06/167,968
Method of spacing sheets and moving groups of spaced sheets
Inventor:
David Bier
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Jul 14, 1980
Inventor
David Bier
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.