Granted Patent
Utility
US 4,708,317 · App. 06/807,803
Electromagnetic actuator
Inventor:
Yasuhiro Hiyama
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Dec 11, 1985
Inventor
Yasuhiro Hiyama
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.