Granted Patent
Utility
US 5,775,367 · App. 08/801,851
Solenoid valve control device
Inventors:
Naoki Yamaguchi, Osamu Akamatsu
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Feb 21, 1997
Inventors
Naoki Yamaguchi
Osamu Akamatsu
Assignee (at issue)
Westinghouse Air Brake Co.
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.