Granted Patent
Utility
US 4,963,789 · App. 07/345,575
Method and apparatus for dynamic magnetic field neutralization
Inventor:
Frederick T. Buhler
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: May 1, 1989
Inventor
Frederick T. Buhler
Assignee (at issue)
Conrac SCD, 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.