Granted Patent
Utility
US 6,409,686 · App. 09/549,752
Virtual probe for a stereotactic digitizer for use in surgery
Inventors:
Barton L. Guthrie, Robert A. Daniels
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Apr 14, 2000
Inventors
Barton L. Guthrie
Robert A. Daniels
Assignee (at issue)
SHERWOOD SERVICES 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.