Granted Patent
Utility
US 6,456,523 · App. 09/762,804
Ferromagnetic double quantum well tunnel magneto-resistance device
Inventors:
Masaaki Tanaka, Toshiaki Hayashi
Patented Case
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Granted: Sep 24, 2002
Filed: Feb 13, 2001
Inventors
Masaaki Tanaka
Toshiaki Hayashi
Assignee (at issue)
Japan Science and Technology
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.