Granted Patent
Utility
US 4,726,192 · App. 07/073,850
Dual fuel injectors
Inventors:
Jeffrey David Willis, Ian M. Waddell
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: Jul 14, 1987
Inventors
Jeffrey David Willis
Ian M. Waddell
Assignee (at issue)
ROLLS-ROYCE plc
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.