Granted Patent
Utility
US 6,776,191 · App. 10/124,299
Spool valve device
Inventors:
Norihiro Nakamura, Yasuo Konishi, Hitoshi Ikeuchi
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Apr 18, 2002
Inventors
Norihiro Nakamura
Yasuo Konishi
Hitoshi Ikeuchi
Assignee (at issue)
AISIN SEIKI KABUSHIKI KAISHA
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.