Granted Patent
Utility
US 4,274,380 · App. 06/008,463
Check valve central metering injection system
Inventor:
Didier J. de Vulpillieres
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Feb 1, 1979
Inventor
Didier J. de Vulpillieres
Assignee (at issue)
Bendix Limited
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.