Granted Patent
Utility
US 4,750,787 · App. 06/919,726
Relay valve for an air brake system
Inventor:
Takeshi Kishimoto
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Oct 16, 1986
Inventor
Takeshi Kishimoto
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.