Granted Patent
Utility
US 6,426,844 · App. 08/526,197
Method and apparatus for phase modulated servo positioning in a direct access storage device
Inventors:
Todd B. Anderson, Mark David Hagen
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Sep 11, 1995
Inventors
Todd B. Anderson
Mark David Hagen
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.