Granted Patent
Utility
US 4,840,306 · App. 07/234,579
Fold-over mailer with side-open return envelope with slittable edge
Inventor:
Leo Lombardo
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Aug 22, 1988
Inventor
Leo Lombardo
Assignee (at issue)
Moore Business Forms, 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.