Granted Patent
Utility
US 4,799,740 · App. 07/132,291
Electropneumatic master controller for an air brake system
Inventors:
Akihiro Iwaizako, Hiroshi Nishii, Seiki Maruta
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Dec 15, 1987
Inventors
Akihiro Iwaizako
Hiroshi Nishii
Seiki Maruta
Assignee (at issue)
Nippon Air Brake 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.