Granted Patent
Utility
US 6,255,815 · App. 09/137,209
Magnetic field calibration device including housing with locator window
Inventor:
Kent Davey
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Aug 20, 1998
Inventor
Kent Davey
Assignee (at issue)
Neotonus, Inc.
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.