Granted Patent
Utility
US 5,153,831 · App. 07/529,868
Electronic text
Inventor:
Peter N. Yianilos
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: May 29, 1990
Inventor
Peter N. Yianilos
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.