Granted Patent
Utility
US 5,892,715 · App. 08/888,924
Non-volatile semiconductor memory device with variable source voltage
Inventors:
Masayoshi Hirata, Takahiko Urai
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Jul 7, 1997
Inventors
Masayoshi Hirata
Takahiko Urai
Assignee (at issue)
NEC 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.