Granted Patent
Utility
US 5,996,548 · App. 09/250,589
Method of operating an internal combustion engine
Inventor:
Wolfram Hellmich
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Feb 16, 1999
Inventor
Wolfram Hellmich
Assignee (at issue)
Ficht GmbH & Co., KG
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.