Granted Patent
Utility
US 5,297,856 · App. 07/982,538
Two separate high speed and low speed disc brake units for railway vehicles
Inventor:
Yoshio Asano
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Nov 27, 1992
Inventor
Yoshio Asano
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.