Granted Patent
Utility
US 5,220,533 · App. 07/788,607
Method and apparatus for preventing overerasure in a flash cell
Inventor:
John E. Turner
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Nov 6, 1991
Inventor
John E. Turner
Assignee (at issue)
Altera 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.