Granted Patent
Utility
US 5,216,634 · App. 07/647,441
Semiconductor memory device
Inventors:
Tsuneo Takano, Masaru Uesugi
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Jan 29, 1991
Inventors
Tsuneo Takano
Masaru Uesugi
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.