Granted Patent
Utility
US 4,701,894 · App. 06/845,194
Magnetic biasing apparatus for magneto-optic recording including a magnetic circuit
Inventor:
Edwin George Watson
Patented Case
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Granted: Oct 20, 1987
Filed: Mar 28, 1986
Inventor
Edwin George Watson
Assignee (at issue)
RCA Corporation
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.