Granted Patent
Utility
US 6,123,603 · App. 09/094,915
Magnetic hard disc substrate and process for manufacturing the same
Inventors:
Kiyoshi Tada, Kenji Tomita, Kurata Awaya, Tomoya Utashiro
Patented Case
View Patent ↗
Granted: Sep 26, 2000
Filed: Jun 12, 1998
Inventors
Kiyoshi Tada
Kenji Tomita
Kurata Awaya
Tomoya Utashiro
Assignee (at issue)
Showa Aluminum Corp.
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.