Granted Patent
Utility
US 4,441,270 · App. 06/407,103
Staggered flip-page display folder
Inventors:
Christopher S. Crowell, Warren Dennison
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Aug 11, 1982
Inventors
Christopher S. Crowell
Warren Dennison
Assignee (at issue)
STRUCTURAL GRAPHICS, LLC
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.