Granted Patent
Utility
US 4,419,685 · App. 06/245,510
Semiconductor device
Inventors:
Yoshitaka Sugawara, Tatsuya Kamei, Tetsuma Sakurai
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Mar 19, 1981
Inventors
Yoshitaka Sugawara
Tatsuya Kamei
Tetsuma Sakurai
Assignees (at issue)
HITACHI, LTD.
Nippon Telegraph and Telephone Public 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.