Granted Patent
Utility
US 4,586,754 · App. 06/633,552
Load compensating valve with check valve
Inventor:
Yoshihiro Kitagawa
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Jul 23, 1984
Inventor
Yoshihiro Kitagawa
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.