Granted Patent
Utility
US 4,837,462 · App. 07/130,640
Semiconductor decoder circuit having switching means for preventing counterflow
Inventors:
Takao Watanabe, Goro Kitukawa, Ryoichi Hori, Kiyoo Itoh, Yoshiki Kawajiri, Takayuki Kawahara
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Dec 9, 1987
Inventors
Takao Watanabe
Goro Kitukawa
Ryoichi Hori
Kiyoo Itoh
Yoshiki Kawajiri
Takayuki Kawahara
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.