Granted Patent
Utility
US 4,678,000 · App. 06/815,998
High speed electromagnetic valve
Inventor:
Takeo Kushida
Patented Case
View Patent ↗
Granted: Jul 7, 1987
Filed: Jan 2, 1986
Inventor
Takeo Kushida
Assignee (at issue)
Diesel Kiki 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.