Granted Patent
Utility
US 4,564,997 · App. 06/369,235
Semiconductor device and manufacturing process thereof
Inventors:
Seitaro Matsuo, Susumu Muramoto, Kohei Ehara, Manabu Itsumi
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Apr 16, 1982
Inventors
Seitaro Matsuo
Susumu Muramoto
Kohei Ehara
Manabu Itsumi
Assignee (at issue)
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.