Flash memory erasable programmable ROM that has uniform erasing and a replaceable writing start mark, flag, or pointer for use in blank, free, or empty blocks

Granted: Jul 20, 1999 Filed: Mar 28, 1997

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.