Granted Patent
Utility
US 4,771,431 · App. 06/901,185
Semiconductor laser drive
Inventors:
Toshihiko Nakazawa, Takashi Murahashi, Yoshiyuki Ichihara, Toshihiro Takesue
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Aug 27, 1986
Inventors
Toshihiko Nakazawa
Takashi Murahashi
Yoshiyuki Ichihara
Toshihiro Takesue
Assignee (at issue)
Konishiroku Photo Industry 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.