Granted Patent
Utility
US 6,449,216 · App. 09/636,443
Method for directional location and locating system
Inventor:
Hans-Ueli Roeck
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Aug 11, 2000
Inventor
Hans-Ueli Roeck
Assignee (at issue)
Phonak AG
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.