Granted Patent
Utility
US 4,291,389 · App. 06/096,099
Memory system using faulty bubble memory devices
Inventor:
Dolan H. Toth
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Nov 20, 1979
Inventor
Dolan H. Toth
Assignee (at issue)
Control Data 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.