Granted Patent
Utility
US 6,670,220 · App. 09/939,669
Semiconductor device and manufacture method of that
Inventors:
Tadaki Sakuraba, Youkou Ito, Hidehiro Takeshima, Yoshiaki Tamai, Toru Saga
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Aug 28, 2001
Inventors
Tadaki Sakuraba
Youkou Ito
Hidehiro Takeshima
Yoshiaki Tamai
Toru Saga
Assignees (at issue)
HITACHI, LTD.
Akita Electronics 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.