Granted Patent
Utility
US 5,478,405 · App. 08/288,866
Method and apparatus for cleaning cylindrical outer surface of a disk for manufacturing disk-type information recording medium and a disk-type information recording medium made by using a disk cleaned by said method or apparatus
Inventors:
Hitoshi Miura, Tadahiko Mizukuki
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Aug 11, 1994
Inventors
Hitoshi Miura
Tadahiko Mizukuki
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.