Granted Patent
Utility
US 6,764,721 · App. 10/690,406
Manufacturing method for a perpendicular magnetic recording medium
Inventors:
Hiroyuki Uwazumi, Yasushi Sakai, Toyoji Ataka
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Oct 20, 2003
Inventors
Hiroyuki Uwazumi
Yasushi Sakai
Toyoji Ataka
Assignee (at issue)
FUJI ELECTRIC CO., LTD.
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.