Granted Patent
Utility
US 6,010,601 · App. 08/978,905
Method of making magnetic disk with boron carbide overcoat layer and adhesion layer
Inventors:
Richard H. Ahlert, James K. Howard, Muhammad Inayet Ullah, Richard Donald Umphress
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Nov 26, 1997
Inventors
Richard H. Ahlert
James K. Howard
Muhammad Inayet Ullah
Richard Donald Umphress
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.