Granted Patent
Utility
US 4,585,279 · App. 06/631,673
Load responsive brake control valve
Inventor:
Shigeaki Doto
Patented Case
View Patent ↗
Granted: Apr 29, 1986
Filed: Jul 17, 1984
Inventor
Shigeaki Doto
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.