Granted Patent
Utility
US 4,646,267 · App. 06/854,502
Semiconductor memory
Inventors:
Katsuhiro Shimohigashi, Hiroo Masuda, Kunihiko Ikuzaki, Hiroshi Kawamoto
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Apr 22, 1986
Inventors
Katsuhiro Shimohigashi
Hiroo Masuda
Kunihiko Ikuzaki
Hiroshi Kawamoto
Assignee (at issue)
HITACHI, 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.