Granted Patent
Utility
US 5,638,012 · App. 08/544,824
Write driver circuit
Inventors:
Takashi Hashimoto, Noriaki Hatanaka, Masaki Yoshinaga, Yuji Nagaya, Tsuyoshi Hirose, Yuji Soga, Tadao Kaji
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Oct 18, 1995
Inventors
Takashi Hashimoto
Noriaki Hatanaka
Masaki Yoshinaga
Yuji Nagaya
Tsuyoshi Hirose
Yuji Soga
Tadao Kaji
Assignees (at issue)
HITACHI, LTD.
Hitachi Computer Engineering 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.