Granted Patent
Utility
US 5,987,137 · App. 08/868,914
Method for the encryption of data transfer
Inventors:
Arto Karppanen, Hannu Kari, Jari Hamalainen, Jari Juopperi
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jun 4, 1997
Inventors
Arto Karppanen
Hannu Kari
Jari Hamalainen
Jari Juopperi
Assignee (at issue)
Nokia Mobile Phones Ltd.
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.