Granted Patent
Utility
US 5,658,680 · App. 08/584,575
Magnetic recording medium and its fabrication method
Inventors:
Teruhisa Shimizu, Shinji Takayama
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jan 11, 1996
Inventors
Teruhisa Shimizu
Shinji Takayama
Assignee (at issue)
International Business Machines 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.