Granted Patent
Utility
US 5,759,159 · App. 08/719,333
Method and apparatus for apical detection with complex impedance measurement
Inventor:
C. Johan Masreliez
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Sep 25, 1996
Inventor
C. Johan Masreliez
Assignee (at issue)
Ormco Corporation
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.