Granted Patent
Utility
US 5,130,517 · App. 07/658,679
Flame-type heater plug with two control coils for an air-compression fuel-injection internal-combustion engine
Inventors:
Friedrich Schmid, Peter Joppig, Roland Klak
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: Feb 21, 1991
Inventors
Friedrich Schmid
Peter Joppig
Roland Klak
Assignee (at issue)
MERCEDES-BENZ GROUP AG
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.