Granted Patent
Utility
US 4,775,823 · App. 06/947,394
Method for controlling opening/closing operation of automatic door in its accidental condition
Inventors:
Yukio Yoshida, Akiyoshi Takimoto, Kenzo Ono, Kiyotada Nishikawa, Toshio Oura
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Dec 29, 1986
Inventors
Yukio Yoshida
Akiyoshi Takimoto
Kenzo Ono
Kiyotada Nishikawa
Toshio Oura
Assignee (at issue)
Yoshida Kogyo K.K.
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.