Granted Patent
Utility
US 4,657,612 · App. 06/713,601
Method of making two-directional pop-up
Inventors:
Donald W. Schoenleber, D. Mark Bosler
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Mar 19, 1985
Inventors
Donald W. Schoenleber
D. Mark Bosler
Assignee (at issue)
Webcraft Technologies, 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.