Granted Patent
Utility
US 4,935,828 · App. 07/213,430
Seek multitasking disk controller
Inventor:
John M. Frissell
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Jun 30, 1988
Inventor
John M. Frissell
Assignee (at issue)
Wang Laboratories, Inc.
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.