Granted Patent
Utility
US 4,901,047 · App. 07/307,365
Magnetic field transfer device and method
Inventor:
Stefan L. Wipf
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Feb 6, 1989
Inventor
Stefan L. Wipf
Assignee (at issue)
Astronautics Corporation of America
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.