Granted Patent
Utility
US 5,321,609 · App. 07/889,180
Electronic encyclopedia
Inventors:
Peter N. Yianilos, Joseph Decker, Rafael Mayer
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: May 27, 1992
Inventors
Peter N. Yianilos
Joseph Decker
Rafael Mayer
Assignee (at issue)
Franklin Electronic Publishers, Incorporated
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.