Granted Patent
Utility
US 4,814,909 · App. 07/150,994
Data transducer position control system for rotating disk data storage equipment
Inventors:
David A. Brown, Donald V. Daniels, Joel N. Harrison
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Feb 1, 1988
Inventors
David A. Brown
Donald V. Daniels
Joel N. Harrison
Assignee (at issue)
Quantum 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.