Granted Patent
Utility
US 5,494,722 · App. 08/009,002
Magnetic recording medium and method for its production
Inventors:
Masahiro Oka, Fumiaki Yokoyama
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Jan 26, 1993
Inventors
Masahiro Oka
Fumiaki Yokoyama
Assignee (at issue)
MITSUBISHI CHEMICAL 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.