Granted Patent
Utility
US 5,834,111 · App. 08/252,664
Multilayered magnetic recording medium with coercivity gradient
Inventors:
Brij B. Lal, Tadashi Shinohara
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: May 31, 1994
Inventors
Brij B. Lal
Tadashi Shinohara
Assignee (at issue)
HMT Technology 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.