Granted Patent
Utility
US 5,644,402 · App. 08/457,219
Device for detecting a conduit and for determining at least one characteristic of its content
Inventor:
Jacques Chevallet
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jun 1, 1995
Inventor
Jacques Chevallet
Assignee (at issue)
Hospal Industrie
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.