Granted Patent
Utility
US 4,481,452 · App. 06/382,936
Control circuit for electromagnetic devices
Inventors:
Yuichi Kitano, Yoshiharu Tada
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: May 28, 1982
Inventors
Yuichi Kitano
Yoshiharu Tada
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.