Granted Patent
Utility
US 5,920,441 · App. 08/532,340
Method and apparatus for controlling a multiple-stage actuator for a disk drive
Inventors:
Earl A. Cunningham, Long-Sheng Fan, Hal Hjalmar Ottesen, Timothy C. Reiley
Patented Case
View Patent ↗
Granted: Jul 6, 1999
Filed: Sep 22, 1995
Inventors
Earl A. Cunningham
Long-Sheng Fan
Hal Hjalmar Ottesen
Timothy C. Reiley
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.