Granted Patent
Utility
US 6,038,444 · App. 08/929,597
Method and apparatus for advising cellphone users of possible actions to avoid dropped calls
Inventors:
John F. Schipper, Hamid Najafi, James M. Janky
Patented Case
View Patent ↗
Granted: Mar 14, 2000
Filed: Sep 15, 1997
Inventors
John F. Schipper
Hamid Najafi
James M. Janky
Assignee (at issue)
Trimble Navigation Limited
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.