Granted Patent
Utility
US 5,988,765 · App. 08/891,357
Fluid pressure control device
Inventors:
Naoki Yamaguchi, Osamu Akamatsu
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jul 10, 1997
Inventors
Naoki Yamaguchi
Osamu Akamatsu
Assignee (at issue)
NABCO, Inc.
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.