Granted Patent
Utility
US 4,873,673 · App. 07/126,485
Driver circuit having a current mirror circuit
Inventors:
Ryoichi Hori, Kiyoo Itoh, Goro Kitsukawa, Yoshiki Kawajiri, Takao Watanabe, Takayuki Kawahara
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Nov 30, 1987
Inventors
Ryoichi Hori
Kiyoo Itoh
Goro Kitsukawa
Yoshiki Kawajiri
Takao Watanabe
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.