Granted Patent
Utility
US 5,391,111 · App. 08/091,987
Method and apparatus for eliminating sudden changes of pressure inside vehicles, in particular ground vehicles
Inventors:
Herve Girard, Jean-Laurent Peube, Yves Gervais
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Jul 16, 1993
Inventors
Herve Girard
Jean-Laurent Peube
Yves Gervais
Assignee (at issue)
GEC Alsthom Transport SA
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.