Granted Patent
Utility
US 5,420,998 · App. 07/866,441
Dual memory disk drive
Inventor:
Randall F. Horning
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: Apr 10, 1992
Inventor
Randall F. Horning
Assignee (at issue)
Fujitsu Limited
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.