Granted Patent
Utility
US 4,989,053 · App. 07/329,051
Nonvolatile process compatible with a digital and analog double level metal MOS process
Inventor:
Everett K. Shelton
Patented Case
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Granted: Jan 29, 1991
Filed: Mar 27, 1989
Inventor
Everett K. Shelton
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.