Granted Patent
Utility
US 5,872,673 · App. 08/007,081
Disk drive zoned sequential data format and head switch sequence
Inventor:
John C. Purkett
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Jan 14, 1998
Inventor
John C. Purkett
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.