Granted Patent
Utility
US 4,985,867 · App. 07/405,026
Semiconductor memory circuit
Inventors:
Toshikazu Ishii, Norimitsu Sako
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Sep 11, 1989
Inventors
Toshikazu Ishii
Norimitsu Sako
Assignee (at issue)
Kawasaki Steel 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.