Granted Patent
Utility
US 4,458,639 · App. 06/275,110
Circuit for controlling glow plug energization
Inventors:
Yoshiaki Abe, Hitoshi Sugimoto
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Jun 18, 1981
Inventors
Yoshiaki Abe
Hitoshi Sugimoto
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.